please do not conflate actual potentially offensive speech with the fucking Riot model of "toxicity", ie a good player getting mad at someone on his team for fucking up
every player with actual aspirations to be good at a game at a competitive level will get frustrated when people aren't focused or make really boneheaded mistakes, the only reason it's less tolerated in tf2 is because this is a joke game with no huge prize pools or lans for people to tryhard for