Yeah I know 2 people IRL who stream as vtubers, and they've both told me independently of each other that the other streamers in the scene can be just as psychotic as the viewers. Apparently it's not uncommon for indies to approach much smaller vtubers in the scene in very creepy ways. I didn't get any specifics there, but I have seen some of the shit their viewers have said, and if other streamers can be as bad as that, then that's fucked.
On another note, why are so many mangaka incapable of doing foreshadowing without just rushing it and shoving it in your face? They introduce the stalker guy by him getting pissed about presumably another streamer having a boyfriend, gets introduced as an unhinged fan with entitlement issues, and then suddenly Nina starts an unscheduled stream, all within the space of 1 chapter (plus 1 page in the last one to introduce captain fuckstick). Hmmm, I wonder what's gonna happen there?