There is no incentive to turn around toxic behavior.
I have come to the conclusion that the chat ban system is broken. I finished my 69 game chat ban and play 5 unbanned games to log in and find myself with a 75 game chat ban and 45 game ranked ban. My account now spends 95% of my games chatbanned, and I FEAR the games that I get a troll because I know one or two reports will mean WEEKS of bans. Many of the reports I get from duos who don't like my build, or trolls reporting the entire team because they got reported. The worst part is that because I was banned previously my reports matter less, and theirs matter more.
I even disabled ALL chat to prevent arguing and never got warned and still find myself banned again. I feel like an ex-con, convicted because I "have a record".
In a nutshell there is no incentive to fix your account. I know that I am just one or two reports away, so I find myself abandoning my account I have had since season 1. It will be faster to just level an new account to 30 and "start fresh". I actually think most trolls must do this.. because it's easier to start over than take your punishment.