I'm actually leaning toward the view that the alternate dimension is not literally hell, but simply one where the laws of physics are so different that anyone who ends up there is "warped" because their minds can't function correctly (i.e. their body chemistry is affected).
Meaning, it isn't ACTUALLY hell, but the continuum warps the mind so it THINKS it's hell.
That's how I've always viewed it. It's not hell per se, but somewhere that's that twisted that humans can't handle it and literally tear each other apart.