There's two issues here, anger management and toxic community. You can start a therapy to work on you, it will help you for the rest of your life but that won't fix the shitty community on these kind of games.

I have some anger management issues too and I had this experience with League of Legends. That feeling of wasting your time and losing a game because a random child decided to ruin it to have some attention.. yeah, I already drop my mic a time or two because of that.

It was hard but the only option for me was asking support to delete my account and definetly stop playing this game because anger management can be addressed, but a shitty community is a shitty community and even if you don't get mad anymore, it's still a pure waste of time for me.

It's hard to stop a game like that with easy and instant adrenaline to learn to take your time on a solo game but in the end, it's way more funny, create globally way less anger and, we're supposed to play for fun heh?