[quote=@Ruiner]
I dont think Trev was in hell more than he was trapped in a swirly primordial sea/cloud/dreamscape made out of malevolence,  horror, and all the icky bits of the human condition.

Probably more than one hell and heaven.
[/quote]

From Azrael's perspective a Hell is just "any place that sucks enough." They're the dimensional equivalent of slums or ghettos. Demons and devils congregate there because no other places tolerate them.