My wife and I make most of our income sell used games online, and regularly receive tirades of abuse from our customers when their expectations are not met. We have been deliberately pivoting our marketing away from core gamers and towards the casual crowds, in fact, partly for this reason.
My old manager, who moved from being an indie game dev to a "regular" programmer, had similar stories - most notably an angry customer who personally messaged his wife with a string of nasty accusations because they disagreed with some particular design choice.
I understand that there is some kind of funnel effect that contributes to this, in the sense that people who are hated by their peers will spend more time engaging in solitary activity. I still don't understand why the community tolerates and even encourages toxic behaviour, though.
[1] I am not talking about the nervous aspie who struggles to make smalltalk; I am talking about the people who sent obscene messages to Neil Druckmann because they didn't agree with some of the choices he made when designing The Last of Us 2.
What would you suggest they do? As long as you play games and post about them online you are a part of the gaming community, it doesn't have the power to exclude anyone.
The problem is just that you have a lot of very opinionated customers in gaming. Customer support hates opinionated customers in every field, not just games, they just have more of them in gaming, and even more the more "hardcore" gaming you get. There is nothing you can do about that, gaming as a medium has potential to create way stronger emotional connections than any other medium and the customer support woes scales directly with that. Games that creates less emotional connections has fewer issues as you say, but people who makes games people connect stronger with will always face issues. The Last of Us was one such game, people really connected with it and then when the sequel didn't turn out as they wanted a lot of people reacted extremely strongly. But the rest of the gaming community can't do anything about that, if a million gamers hated Niel Druckmann then they will post about it, create forums about it, and some of them will harass him, just like any other huge emotional mob.