Elo hell exists, but the elo range it exists in is relative to your skill level. Elo hell exists just under your true elo, where it becomes immensly difficult to carry a bad team to victory. Before that point, you're so much better than everyone else that you barely notice/don't mind the mistakes your team is making, because you know you'll be able to carry your team. Once you hit your personal elo hell, that's when you'll start raging at the poor choices your teammates make. You're no longer good enough to make up for other people's mistakes.