Permabanned for a couple of bad words = death penalty for littering

OK so I just got permabanned (this is my first ban as far as I can remember they didn't punish me before) They gave 3 game chat logs as the reason and said that I'm in the 0.006% of toxic players out there which is definitely not the case, I've seen toxic and this doesn't come close in 95% of the cases I was just commenting on the game, saying good job, that champ is op and stuff and only a few of the comments went towards other players, some were just said jokingly btw So how is this fair? to permaban a player the first time you punish him over basically nothing? I've played on EUNE as well (btw a ban wasn't why I moved) and there players were saying heinous stuff to each other all the time without worrying about a serious ban. I got tilted there also and I said way worse stuff than here (hey, everyone gets mad once in a while), but only got a chat ban and a 1 day ban. What the hell is going on on EUW? I guess that guy who said one of the reasons not to play LoL are petty permabans was right, I just got one