It's just amazing how lenient this game is for trolling. Never seen this bad situation in other multiplayer games. CS, Rocket League, those games I can carry by myself even if my team is a bit bad. But not LoL, I can take all objectives, do good ganks and whatever - if my team has the guys who just refuse to group and end up 6/14 or something similar, I lose. And they don't get banned, because "bad" game, which is complete shite. They either troll or have boosted their account - both punishable.
I guess I should just start to be cynical and feed every game I have an idiot in team and stay at relatively low elo. If you can't beat them, join them eh?