T.J. Miller was considered "untamable" and "almost a danger" on the Silicon Valley set

The Hollywood Reporter

At times, the comedian showed up "seemingly under the influence, if he showed up at all," reports The Hollywood Reporter, adding that Miller would fall asleep between takes and his behavior caused schedules to be rejiggered. "There was almost a danger to having him around,” said one insider. "He was explosive, and there were moments where you'd go, 'Whoa, that's not where I thought that was going at all, but that was f*cking awesome' … but it was a trade-off." Creator Mike Judge added that "it's not fun to work with someone who doesn't want to be there." Asked to respond, Miller said: “In real life, I’m not always high like Erlich is. And this will blow your readers’ minds, but I’m not high when I work because it gets in the way of the comedy. I also am not a guy who’s blackout drunk, bumping into things on set. … What was occurring was I was out doing stand-up all the time, even if it meant I only got three hours of sleep. So, the thing I have a problem with? It’s pushing myself to do too much.” Meanwhile, the showrunner says Miller's exit gives the show a clean slate to work with, especially since "T.J. wasn't LeBron."