Stereotype that is wrong it’s not about sensetive anime fans, but rather people who feels save behind the anonymity of the internet. In real life this people wouldn’t act like that like they do on the internet or in moba games, because they would fear to get sth. in their face for being rude.
Edit:
Another point is that this game is a TEAM game that means it demands responsibility and trust in your teammates, but this idea kinda collides with the anonymity of the internet, because the majority of player aren’t ready to trust strangers, but they have to in a competitive games and that means you should be able showing weaknesses (admitting you make mistakes) and that is kinda counter-productive and mental challenging.