How would a disembodied soul sense anything about its environment, let alone sense a lake of unquenchable fire? It's not like it would have skin to be damaged by heat, nerves to transmit the sensation of pain, or a brain to interpret those electrochemical signals as suffering.
Some people prefer to think of hell as a place of great mental pain, but again, without a brain, what is registering the pain? For that matter, what is registering that there is a "you?"
Consciousness and self-awareness do not survive the death of the brain. Brain tissue is the substrate in which the changes that comprise consciousness become noticeable. It's sort of like filling a bowl with water, and then watching as the wind blows ripples into its surface. The water is the substrate, the wind is the surrounding physical world, and the ripples are the interaction of the two, where we observe the phenomenon of consciousness. Asking what happens to the mind after the brain dies is like asking what happens to the ripples after the water in the bowl evaporates. There is no answer, because the question makes no sense.
I suppose it's possible there is a hell down there somewhere, but if you died and went there, how would you know . . . ?