Banned w/o warning?

My account was permanently banned but I feel that it was pretty unfair since I received no chat restriction or anything. The game also took my chat histories from games that I played more than a couple of days ago, which seems pretty unfair as well. Sometimes it's hard to keep track as to how toxic I have been in the past games, as when I get feeders on my team I forget that being toxic and typing mean words is worse than ruining the game for 9 other people. I liked how a long time ago I was told something everytime I was reported something like "Your recent chat bla bla bla toxic bla here is your 10 game chat restriction." I feel like this actually prevented me but now, it feels like they've gathered a game i was toxic a week ago, a game i was toxic 3 days ago, and a game i was toxic in yesterday. Honestly, this is my second permanently banned account, and I feel that the things I said were not all that bad as one of my games only contains one cus word. I had an illaoi on my team that gave up after a few deaths and I told him to let us carry him but he cried and continued feeding. I know posting this won't do anything since the Riot team is pretty fucking garbage and apparently this game is intended for fucking 3 year olds who cannot use the mute button and are the equivalent scum of that 3rd grader who told the teacher on you for saying the f word. But just letting some of you other toxic players out there with a warning that apparently you will not get a chat restriction anymore or any warning what so ever about the letters you type on a keyboard that do hurt your fellow summoners. Also fuck you riot, i posted a fucking bug report 4 months ago and reuploaded 3 times and sent 2 tickets and there is still no fix on it.