I've never gotten banned and when I think about it I'm actually a really toxic guy, or if provoked I should say. I never lash out at anyone for being BAD but if they're ruining for someone else I can get kinda mad :/ However I'm lurking around the 3k elo ranging from 2750-3200 elo. It can get back to 3200 and then it might not take long until I'm 2800 again.
With that being said I'm mostly a SPL2 player though, where we USUALLY have good coms and teamplay but the skillgap is too big, all you need to do is get lvl 10 which isn't hard, just go ahead and win your 10 first and you're about 2k elo :) When I play normal faceit, especially 5 stack I almost type more than I play just for the fun :))) I like baiting people, however this post is not one of those. Here I believe I'm being sincere but I haven't really gotten to the point yet.
Try FPL? (French Pro League, I don't know if this is a thing though). But find something you find more important and normal faceit matches won't stress you enough. If that is not something you're interested in I understand the struggle of being 1800 elo, been there, done that! But you just gotta focus on your positives and punch through that shell and prevail. Try to find some good french friends to play with, (if ur not fake flagging ofc). Bye and have a good day :)