The main problem with the whole idea of hell, as conceived in modern christianity, is that it practically doesn't take culpability into account, which would make God's justice inferior to modern day western civilization justice systems, which reflects an outdated, medieval moral system. Interpretations vary, of course, but even the interpretations that allow for some measure of culpability seem unreasonably unfair in comparison to non divine justice systems. This is among the reasons to why I distanced myself from both protestantism and catholicism.
Here's an example:
1-Prima kills a man. Prima has no particular reason for having done this, other than maybe disliking said man. Prima does not regret her act and does not ask for forgiveness.
2-Secunda kills a man. Secunda did this because this man has kidnapped her, kept her in captivity and tortured her for +5 years. Secunda does not regret her act and does not ask for forgiveness.
Now, if you asked pretty much any american pastor, he would say that both Prima and Secunda would go to hell, because regardless of the reason each of them had for commiting murder, they've committed murder, which is a mortal sin, and warrants condemnation to eternity in hell. Punishment is dealt in accordance to an almost Kelsenian view, in which the moral nuances are thrown aside in favor of a purely objectivist viewpoint. You committed a sin, you go to hell forever, period.
Now, in pretty much any reasonable court of law, the particularities of each case would be taken into account. Prima would most certainly receive greater punishment than Secunda.
All of this basically means that, by applying an outdated, nearly medieval concept of justice and making it divine, the most popular branches of christianity today are making God's justice seem unfair and inferior to (most) human justice systems.