I'm so sick of people who play this game for the wrong reasons.
That's not to say that there are objectively wrong reasons to play any game, but holy shit it seems like they're all that's left after years of riot catering and designing their game with them in mind.
I'm talking about the people who only play the game to win (not even in ranked). Then constantly berate anyone who is just playing to have fun, and doesn't care about the outcome of a particular match. The kind of people who are incapable of enjoying a game beyond the results they're expecting for the match.
If you're wanting to get better at this game fine. Though, that's clearly not the reason these people play, otherwise they might take a losing game as an opportunity to learn how to improve. Even if you're only concerned with winning, getting angry at your teammates for not doing literally everything to try and win is fucking stupid, because you're assuming they have the same intentions for playing as you.
To all the elitist try hards, this game is already being tailored for you with complete disregard for the other players. The least you could do is shut up and actually try to learn to play the game, because apparently this person's half-assed builds and half-hearted play is enough to put them in the same MMR as you.
"You're shit" is probably the least self aware insult I've ever seen thrown around in this game.