For TLoU adaptation, I'm pretty sure that the network is the one who fired him, rather than him leaving willingly. I believe he was involved in the casting decisions, and there is no one who believes that Goblina was a good choice for Ellie, and he wrote the scripts in large parts, which were nearly universally hated even when it was just a video game. It's his ego that forced them to make as few changes as possible, likely because he convinced himself that it was only the unwashed masses of gamers that couldn't appreciate the genius of his creation, but that audiences at large would broadly find it appealing. So when the ratings flopped hard after Joel's death, he was the one to blame, and he was cast out entirely, so that a competent writer could come in to try to salvage this train wreck.

I think that he's already lost most of the favour he once held. Intergalactic isn't even out yet, and it's already being mocked. People will tune in to watch SyntheticMan's review, laugh a bit, and then proceed to never think about it again. Naughty Dog seems like the next company to rush towards the chopping block, right on the heels of Bioware.