I was banned a few months ago (6ish?) or so on my main account Ddrfatkid.
I had multiple suspensions (probably 10 or 15) as well as a final ban, my behavior was ridiculous. After I was banned the only thing I could remember was '78% of players improve their behavior after punished by tribunal and never repeat' .
I have had issues all my life, finally sought out professional help...didn't play any games for several months. I came back and started playing league just for fun, I hit 30 after a few weeks...got back into ranked, and i've steadily climbed to silver1 (almost qualifying for gold) since.
Hopefully this post won't get my account banned, as it's the same IP...but I just wanted to say thanks, the ban made me realize some stuff..and i've been working on it since.