User blog comment:N00bpl0x/Any tips for fixing my attitude problem?/@comment-1330314-20131224061350

I have exactly the same problem as you do. One of the ways I try mitigating this is by taking a short break if a bad game just made me mad. It's hard, particularly as you're going to want to have a good game immediately afterwards to make up for the one you just had, but for me doing so just gets me increasingly pissed off at my new teammates for even the smallest mistakes they make (regardless of whether or not we're winning).

Along with that, if you feel you're doing generally better than you teammates, you could try a few ranked games to raise your elo and get yourself matched with people who won't frustrate you as much.

Also, if you're angry or stressed out by something IRL, do not play League to calm yourself down. People who use "I'm having a bad day/X bad thing happened to me" as an excuse for their toxic behavior are trolls: League of Legends is itself a stressful activity, requiring high amounts of concentration and cooperation with several other people you may not even know for an extended amount of time. Basically, it boils down to realizing when you're angry, and taking steps to avoid making yourself angrier.