A Kotaku article that's done more for me than the Tribunal ever did
Riot doesn't care about reforming behaviour, they care only about punishing it. They don't teach you how or why League creates a situation where you find yourself losing control in fits of rage during games, they just ban you for it.
I've always been a strong believer that the design of MOBAs triggers reactions seemingly beyond your control. Here's the best part: raging is not your fault, League is responsible for that. But, you can improve and resolve your rage and other reactions and in-turn, your win rate, with these techniques.
For all of those people out there who have struggled with being toxic in games, there is hope. It just won't come from Riot (or a community that is set on blaming the individual solely for their actions).