ELO hell is a lie your mind creates to shield itself from the hard truth.
The only constant variable from game to game is you. Not the feeders, not the AFKs, not the flamers, not the trolls, YOU.
Considering you are not the troll, you have 4/5 chance to get one of the above on your team, where the enemy team as 5/5.
That means that there is statistically more trolls on the enemy team than on yours, so "unlucky teammates" is actually a non factor over a lot of games (unless you're the troll in which case there is a troll on your team 100% of the time!).
Some games you will lose no matter what, accept it, it's just like that in a team game with strangers.
Some games you will win no matter what, just take it (it actually balances out the previous one but you don't notice it because you focus on the negative).
Most games your actions can directly influence the outcome of the game (focus on improving YOURSELF and this is where the magic happens).
TL;DR: Faker didn't become Faker by getting lucky with teammates. Stop telling yourself it's not you fault and start improving.