I Should Quit This Game

Probably you guys agree with me but this game is just so tilting. I am not a guy who rages at my team mates for doing bad, knowing I have bad games as well and knowing telling them their bad is an automated GG nor do I call GG on a match that is close. But I am probably going to get banned now (strike 3, 2 week ban) because of how frustrating and how stupid people can be. I spent my last game arguing with my support who wouldn't surrender the most obvious of losses (we were 20 kills behind, other team's carries were fed; our's weren't and we got disintegrated every team fight no matter how we shaped ourselves).

I've won 6/18 matches which just made this match that much more frustrating as I think of myself as someone not toxic, but I continue to lose every game no matter how good or bad I do. How do I win matches and put up with staying in obvious loss games but can't surrender because your team mate is a fucking dunce wasting time.