This isn't some guy with a few thousand followers. He's literally a celebrity. He would need to delete all his publicly accessible social media, stop reading emails, and have the will-power not to go down the rabbit hole of reading the online discussion about him.

You act as if just disappearing as a celebrity is some easy job. Especially one in this area (Twitch), where the audience is more pervasive. There's plenty of celebrities out there who try to filter out criticism online but can't help themselves but get consumed by it. Kevin Durant is a great example. The guy has no reason to care about what some kids say about him on social media, but he still gets sucked into conversations about him online.

If you haven't been in the situation before, I think it's pretty unfair to just say "ignore it".