The problem is everyone has feelings and they matter more than facts. We can go on why it is wrong to be gay, homophobic, racist, etc...but it all comes down to when people cry because they got their feelings hurt, they will get some type of punishment. Welcome to not only multiplayer gaming, but they real world, especially the US. Feelings now will matter more than facts. Who cares about feelings anyways?
Helpful advice which worked for me. If you start to feel like you are tilting or can't control your toxic fingers, just mute everyone and disable cross team chat with some music blasting and play the game. If you no longer enjoy it and feel like you are raging every game it is either time to take a break or quit for a while or all together. Many other games out there and there are other things to do besides playing games as well.