We have a name in polite society for people who actually don't care what anyone else thinks.
Sociopath.
I'm surprised this spurned so much discussion. I don't hold the streamer responsible for it because I can just choose to drop group and do something else. There is a social aspect of gaming that has gone completely awry and that's just being decent and respectful to people. The amount of venom and vitriol people spew in games over even minor things is outrageous. And Twitch, and streaming in general, seems to have exacerbated the problem by giving people, and I don't even mean the streamers themselves but even just their chat, a platform to be anonymous shitheads with a voice.
What stresses me out isn't performance anxiety, but rather anxiety about trying to keep myself calm and not overreact when someone starts raging or being a hateful prick. It immediately comes to mind that I am going to fuck something up minorly, which won't be a big deal, but then I'm going to have to tell some childish little prick to shut his mouth because he's acting like I just depleted the key. Shit goes wrong and I am not infallible. I'm a good player who makes mistakes all the time, like most people in my raider.io bracket. And when you run into this kind of behavior consistently, even when not playing with a streamer, having a streamer and all his viewers also watching compounds that stress 10 fold for me. My mind has already deemed it an inevitability and I can't help it.