David Krumholtz surprised fans this week when he vowed to take an ‘indefinite break’ from acting because he’s ‘fed up’ with Hollywood.The Oppenheimer star, who’s been in the industry for three decades, raised eyebrows with his social media outburst, when he confessed he had been wrestling for ages with quitting but was ultimately ‘frustrated, fed up, fried’.Krumholtz, 48, has since deleted his post on Threads and seemingly backtracked by later telling Raising Hope star Garret Dillahunt that it, ‘Ain’t over, rather, redefining my terms. Hoping to find a new, more rewarding passion.’ Indeed it wouldn’t be the first time that Krumholtz has been hasty to fire out a social media post, becoming known for his online bust ups over the years. Mere weeks ago, Krumholtz caused a stir on Threads when he responded to a post by author Alex Kornswiet, in which she had called for celebrities to ‘act like normal humans’. She penned in a seemingly generic post: ‘Hey, celebrities, before you get too comfy here, I just want to cover a few important things. We DO NOT do celebrity worship here. You’re just another person. ‘We DO care who you voted for and what you stand for. If you’re a piece of s**t, we’ll ratio you and call you out for it. Act like a normal human, interact with others as if you’re not famous, be a good person, and you’ll be welcomed by new Thriends.’ David Krumholtz’s complicated legacy explained as Oppenheimer star ‘quits’ acting after harassment accusations, ‘unprofessional’ on-set behaviour and life-threatening health woes The Oppenheimer star has been in the industry for three decades but he is now ‘frustrated, fed up and fried’ (pictured in The Santa Clause with Tim Allen) Krumholtz, 48, since deleted his post about quitting acting and seemingly backtracked by later telling Raising Hope star Garret Dillahunt that it, ‘Ain’t over, rather, redefining my terms’Krumholtz was quick to respond, claiming Kornswiet was encouraging bullying and treating celebrities like ‘others’. He reposted her Thread to his 69,000 followers and added: ‘So, you’re advocating for bullying celebrities if they don’t tell you what you want to hear? Mature. ‘How about a more general, since you’re so bold as to speak for the entire app, of not telling other people, of notoriety or not, what to do and how to be? Your rules and the unearned hubris behind them are incredibly absurd, but not laughable; quite sad. ‘Thanks for ‘othering’ celebrities and then advocating for them to be bullied. Sounds a lot like X.’However, Krumholtz’s post backfired, as he was soon accused of harassing a social media user online for having different views. One user shared a series of screenshots she alleged came from the actor’s X account, in which he branded her a ‘stupid c***’ and ‘sick f***er’. The account tarasel_of_progress penned: ‘David Krumholtz harassed me for years after I disagreed with one tweet of his.’In 2014, after Philip Seymour Hoffman died, David tweeted that Hoffman’s overdose was a “beautiful sacrifice for his art.” I replied that it was an alarmingly bad take. That was it.’He responded by spending the day attacking me with misogynistic slurs, wishing harm on me, sending disturbing DMs, blocking/unblocking/following/unfollowing, deleting and reactivating, and using obvious burner accounts to keep going.’ She continued: ‘It was not normal celebrity defensiveness. It was alarming.’When I tagged the network he was associated with, he suddenly apologized and claimed he donated $1,000 to a domestic abuse charity. Something I did not ask him to do. When I did not give him the absolution he wanted, he went right back to attacking me.’Years later, when he tried to publicly position himself as supportive of women during the Me Too/Time’s Up era, I called it performative based on my own experience with him. He came after me again. ‘In 2018, after I posted that I got my dream job, a burner account replied saying, “I hate you,” and listed all the past reasons why. I had not interacted with him in years.’Accusing Krumholtz of continuing to message her over the years, she went on to claim: ‘This is not about one old bad tweet, or him having a bad public moment. ‘This is about a pattern of misogynistic harassment for years, burner accounts, online stalking, and a grown man refusing to let go because a woman told him he was wrong.’Golden Globe nominee Don Cheadle, who starred alongside Krumholtz in an episode of Black Monday was quick to comment, responding: ‘Sheesh …’ The Daily Mail has contacted Krumholtz’s representatives for comment. In June, Krumholtz was accused of harassing a social media user. Tarasel_of_progress penned: ‘David Krumholtz harassed me for years after I disagreed with one tweet of his’ She continued: ‘It was not normal celebrity defensiveness. It was alarming’ and shared a series of screenshots she alleged came from the actor’s X account She accused Krumholtz of continuing to message her over the years Golden Globe nominee Don Cheadle, who starred alongside Krumholtz in an episode of Black Monday was quick to comment, responding: ‘Sheesh …’Krumholtz started acting at age 13 when he went with friends to audition for the Broadway play Conversations with My Father. He was cast and starred in the show with Judd Hirsch, Tony Shalhoub and Jason Biggs. He recalled being ‘egomaniacal’ at work, confessing: ‘I was a really irresponsibly, unprofessionally behaved child.’ Yet he quickly saw the error of his ways, telling People: ‘I was just so mortified a few, just a few months later.’ He continued: ‘In Life With Mikey, my first movie, which was my second job, I play a nasty egomaniacal piece of c**p little child actor. ‘It’s almost like I had to play that character to exorcise that demon in a way and like realize, oh, I’m kind of like this guy. So I took it down several notches. And then I just got grateful really quick.’Krumholtz went on to make a name for himself as Bernard in The Santa Clause franchise, where he starred alongside Tim Allen. Yet he was still young and prone to making mistakes, with the actor recalling he ruined Hilary Duff’s Disney parade in 2002 after refusing to appear in costume with her while ‘high as hell’.Krumholtz recalled the experience on X/Twitter in 2024, revealing he had flown to Orlando with a pal and his drug dealer, shortly after wrapping The Santa Clause 2. He penned: ‘I’m popping Vics with my weed dealer and one of my best buddies and it is AWESOME. I’m a Disney nerd. This could not be more ideal. I’m high as hell, and I’m ready for anything… well, not anything…’Krumholtz was due to change into his Bernard the elf costume and appear on a float with Duff, who sang on the film’s soundtrack. However, he claimed he was not told about the costume in advance, continuing: ‘Here’s where my inflated ego comes in. can’t do this. My IMAGE under threat! PTSD! I never thought I’d wear that s**t again! I tell them I won’t do it. ‘They are openly p***ed off. I feel awful, I got the “treatment” but I was never told about this! I refuse. I pitch myself riding solo on a horse drawn carriage in front of Hilary Duff’s float. As me. Myself. David f***ing Krumholtz. In a Pluto sweater.’ While the parade producers reluctantly agreed to his request, he revealed it didn’t go down well with Duff. He recalled: ‘I take my seat in the horse drawn carriage. Behind me, Hilary Duff stands alone on the Santa Clause 2 float. I turn & look back at her & give her a friendly wave hello. I’ve never met her before.’She responds with a p**ed off “what the f**k?” shrug. I turn back around. “Ok, don’t look at Hilary Duff again.” I’m high. I’m fine with myself. This is gonna be great! Regis Philbin hosting!’However, the crowds failed to recognise Krumholtz out of costume and the parade director later called him out for his behaviour. After the experience, Krumholtz did not portray Bernard again until 2022 when he appeared on the Disney+ series The Santa Clauses.’I didn’t work for Disney again for 20 years,’ he wrote. ‘Looking back, I should have done it. I would totally do it today. I’ve yet to reunite with Hillary Duff, I owe her an amends. Maybe she’ll read this. ‘I’ve been my own worst enemy in this biz. I accept the elf thing now. Note to actors: Never poo poo any work. You are not above the privilege of working in film and television. I’m a fool. The end.’ Krumholtz recalled ruining Hilary Duff’s (L) Disney parade in 2002 after refusing to appear in costume while ‘high as hell’, and also apologised for being drunk on set in a movie with RihannaLast year, Krumholtz revealed he no longer smokes marijuana after he developed a rare condition called cannabinoid hyperemesis syndrome (CHS).The Numb3rs star explained he started using marijuana again after ‘a long break’ and soon became ‘a daily smoker’, but ultimately ended up hospitalised. ‘It’s rare, [but] it’s becoming more and more prevalent yearly — like, numbers are doubling every year,’ he shared with Page Six at a screening of Riff Raff.He said there are ‘a lot of theories’ as to what has caused a spike in CHS, which only affects ‘daily long-term users of marijuana’, but he thinks cannabis companies are to blame.’Essentially, they messed up weed,’ Krumholtz said. ‘They made it too strong, and they don’t know why it’s happening.’In the United States, cannabis is legal in 39 of 50 states for medical use and 24 states for recreational use.CHS ‘leads to repeated and severe bouts of vomiting, which ‘only occurs in daily long-term users of marijuana,’ according to Cedars-Sinai.’I wouldn’t wish it on my worst enemy. I almost died a couple of times,’ Krumholtz said of the nausea, adding that he was ‘serious’.’I have unpaid emergency room bills up the wazoo. It’s really bad. It’s really dangerous. It’s as serious as a heart attack. It’s horrifying for those that suffer from it.’He said he thinks ‘no one talks about’ the dangers of weed ‘because it’s the friendly drug, it’s the drug that doesn’t kill you’.But, he very solemnly added, ‘It’s a very addictive drug… and now that it’s super strong, it’s really addictive.’Krumholtz no longer smokes marijuana as a result. The star is also teetotal after confessing to being drunk on set while filming Seth Rogen’s 2013 apocalyptic comedy, This Is the End. He told Marc Maron on his podcast: ‘I was incredibly drunk in one of the scenes in that movie, and I regret it. I no longer drink. ‘They put me next to Rihanna, and I was wildly drunk. And she knew it, and I knew she knew it, and she was wonderful. ‘And I was – I wasn’t mean to her, but I was just a drunk around her. This is my way of apologising to Rihanna.’ Krumholtz, who has appeared in recent films such as Supergirl (2026) and Springsteen: Deliver Me from Nowhere (2025) and played Isidor Rabi in Oppenheimer opposite Cillian Murphy Among the other notable films he’s been seen in include 1998’s Slums of Beverly Hills and 1999’s 10 Things I Hate About You (pictured) as well as Numb3rs and Freaks and GeeksOn Tuesday, Krumholtz claimed he was ‘frustrated’ and ‘fed up’ with Hollywood as he announced his acting hiatus in a now-deleted post.The actor told fans via Threads that he ‘kinda sorta put [his] acting career on hold the other day’, adding: ‘There was a time when being competitive and self-involved really served my pursuit. That time has passed.’Krumholtz said that stepping away from the entertainment industry has ‘been something [he has] been petrified to do for years’, adding that he harbored a fear he’d ‘go broke and not be able to handle being out of the game’.The New York City native, who played Isidor Rabi in Oppenheimer, stated that ‘a huge wave of relief washed over’ him after he ‘sent the definitive email’, despite uncertainty of what lies ahead for him professionally.’Not sure what I’m going to do for money instead, or how I’m going to do it, but I just removed a humongous burden, one that I truly didn’t fathom the weight of until it was gone,’ Krumholtz penned.He concluded the post, which was later deleted from Threads, with: ‘Frustrated, fed up, fried’.Krumholtz, who has appeared in recent films such as Supergirl (2026) and Springsteen: Deliver Me from Nowhere (2025), subsequently posted to his Threads followers who reacted with supportive sentiments in the wake of his now-deleted announcement.He said that ‘the love and encouragement’ he received online was ‘overwhelmingly surprising’, as he explained how he was disenchanted with the business itself as opposed to the art form.’Acting professionally is a very different concept than the exercise of acting itself,’ Krumholtz said. ‘I’ve enjoyed every single minute of exercising the muscle. I’ve enjoyed the fanfare.’There was a time when being competitive and self-involved really served my pursuit. That time has passed. Much to MY overwhelming surprise. There will always be great joy in the exercise. But for me, the profession has lost its gleam.’Krumholtz has been active in showbusiness for more than three decades, beginning in 1993 with roles in films such as Addams Family Values and Life with Mikey.Among the other notable films he’s been seen in include 1994’s The Santa Clause, 1998’s Slums of Beverly Hills, 1999’s 10 Things I Hate About You, 2004’s Ray, 2004’s Harold & Kumar Go to White Castle, 2007’s Superbad and 2016’s Sausage Party.He’s also maintained an active presence on TV in that time, appearing on hit shows including Numb3rs, Freaks and Geeks, ER, Monty, Chicago Sons, The Closer and The Trouble With Normal.