Uhm,... Yeah, there's not team play in Bronze because it's Bronze. Bronze is Bronze because people don't know how to play the game well. Bronze is Bronze because teamwork is nonexistent. Bronzies stay bronzies because none of them realize teamwork is how you win the game. You get out of Bronze because your teams suck a little less, you do a bit better than your opponent in lane, and people decide they want to listen.
But the matter of the fact is
YOU CAN BE DIAMOND. YOU CAN BE FREAKING MASTER YI. YOU CAN'T 1V5 A TEAM THAT IS LEVELS AHEAD OF YOU. (And that's HONESTLY how trying to carry a game in bronze by yourself is)
You get out of Bronze by being a leader and by consistently playing well, and that means playing only when you're not in emotionally distressed states.
I left league because my stress levels and rage towards bronze players in my rank was negatively affecting my playstyle, despite the fact I was moving up through Bronze quite fast, I consistently hit walls in my series that prevented me from going further, not because my playing was horribly bad, in some cases it was really good, but because I had a teammate fail bad in lane, troll, or afk.
Elo Hell exists, and is quite real, but it's much more of League of Migraines than Elo Hell to be honest. Hell implies you're stuck there, and it's easier than popular belief to climb out of Bronze. But contrary to popular belief, you can not single handedly carry a team, you have to facilitate some level of teamwork to get anything done, even if the level of teamwork is "You stand there, please" you HAVE to somehow get at least SOMEONE working with you,