Does anyone else think that the banning system and overall other players are too soft?

I just read Episode 1 of The Verdict it's amazing that one simple "useless Caitlyn" comment gets a guy banned (What I am referring to: https://boards.na.leagueoflegends.com/en/c/player-behavior-moderation/5axUFez1-the-verdict-episode-1).

Are we really at the point where we need people banned for one simple insult? I mean I get that being toxic is bad and I support toxic players being banned, but if one, not even that bad of an insult is enough to get a guy reported and then punished then I am glad I don't play anymore. Verbal toxicity that should be banned in my eyes is frequent verbal abuse and or telling someone to kill themselves, that's it, if you can't handle being called useless or bad once or twice because your team is frustrated then you should really consider /mute all or playing with friends. This is an online multiplayer game, people get upset, people want to win, it's the same in DOTA, CSGO, HotS, WoW, or any other MOBAs, FPS or team based games, and not everyone has the self control of a saint to not type something when their team mate has screwed up multiple times and has cost them a game.

People need to learn to mute players and move on, yeah being called bad is shitty, childish and not right, but if can't press a few buttons to stop seeing a guys messages because you got told that you're trash because you're 0/8 at 20 minutes, good luck to you then.