OMG I WENT LIKE 17/2 AND LOST, THIS ELO IS FULL OF NOOBS.
Except, going 17-2 doesnt show you are good. it just shows you completely demolished your lane opponent, farmed him the whole game, but he was pretty worthless after you got the first 3 kills on him. at that point your laning opponent has no chance of catching back up to you unless the game lags into the 50 minute mark where everyone is a 6 item champion anyway.
but you still lost, because while you were busy farming the baddie you were against you forgot you have a top and bottom lane as well. and they were outmatched.
you probably would of won the game if you went 8/2 instead of 17/2, and you got 3 kills on your lane opponent, then 5 others from ganks in bot and top lane.
it would of been even better if out of the 3 kills you would of gotten on your lane opponent, you would of invited your jungler to come kill him once, so your kda would be around maybe 7/2/1 at end of laning phase.
because you would of helped your jungler get a bit more gold too.
even terrible players, if given enough of a head start will stand their ground against oppresive lane opponents. but if you just farm one champion in your lane all game and expect to win because you went 17/2 its likely not going to happen.
you are 20% of the success of the game. you cant win something if you only have 20% success.