Don't Let Flamers and Trolls Get To You
In two of my recent games, I had people that flamed at me and trolled. In the first one, there was a Warwick jungle that seemed to like the words "retard" and "downsie". Even though I was doing perfectly fine, he flamed at me and then said that "if I could throw a game, he could too" and then he stopped trying. He refused to do anything useful in teamfights and continued to flame. In the second game, I was playing Braum, supporting Vayne. Every 10 seconds Vayne would to me not to figth(that's actually how she spelled it) because apparently staying under my turret was being too aggressive. Then she was go in 1v3, die, and then say I had mental problems because I kept "figthing".
The point is, don't let these types of people get to you and put you on tilt. There is a mute button, after all.