See, it's not like everybody in the supposed "elo hell" loses. One team has to win, and it's not hard to reason out why.
I've expressed this multiple times, but if you're better than your actual elo and trying to win then you should win more games over time than somebody who deserves their actual elo. Simple observation shows that, if you're better than your matchmaking thinks, your team has only 4 slots for toxic or really bad players, while your opponents' have 5 slots for aforementioned players. So statistically speaking, your team should always have a better selection of players for the majority of the time, which translates to more wins over time.
Or you can just learn to carry hard as master yi, trynd, or yasuo and just force pushes through overwhelming 1v5 crit champ master race yolo queue mentality. Because that shit works in low elo, assuming you know how to last hit.