For those who aren't familiar with ELO hell, it's a term derived from a bracket in the ranked ladder which is very hard to break or climb back up. Currently, the ELO hell is around 1200-1300 and before Season 2, it was maybe 1000 ish?
I personally believe in ELO hell because it's like trying to swim in stormy sea with squids pulling you down with their tentacles. In other words, there shall always be a leaver or a "130 games played" player who doesn't grasp the concept of competitive play yet.
I am mainly out of the worst stage... the 10 first games part, and I have gone as high as 1300s and then get unlucky streaks with leavers or bad team compositions etc. I am currently floating around 1120 and I'm holding my grasp because trust me, nobody wants to go below 1100.
This is my opinion.