I don't believe in heaven and hell but I think that in case those places exist, probably the majority of humanity would be on hell.
The existence of both places would require a metric that defines to which one you belong and a superior being/force that establish that metric (God, universe, etc.). And the difference across different times and cultures would make that every society makes something that that metric considers "bad".
For example, slavery has been abolished in the majority of countries of the current era, but also the number of people in prisons have been increasing.
¿What would happen if, to that metric, freedom is the most valuable thing? Would there be any difference between slavery and put someone in jail? A judge and a slaves owner would be considered the same (taking away the freedom of someone)
Maybe suicide is the maximum representation of the free will and you may be rewarded
Thats why I dont believe in those things and if they exist, I dont think the actuals things society defines as good/bad will be the things that define where you end.