All of this talk about percentage winrates in different elos.
First big problem Players that have NO idea how to play the champ - play the game Example is . . FIRST TIME X champ LUL, lock in.
So we're looking at a ton of players with 0% winrates already.
Second problem Flukes. Maybe the enemy team just.. sucked. Or were tilted.
Third problem There are 10 bans, that are counter-picks to "meta" champs.
Fourth problem Blatant smurph issue in League.
5th problem Matchmaking is god awful, there will always be people that "don't care" whether they win or lose, regardless of how high ranking they are.
This is such a terrible way to balance a game, and just blatantly LAZY. You wanna see why Starcraft 2 turned into shit? LAZY balancing. They literally ran X numbers of units into each other and completely disregarded micro.