I think you answer your own question in this article , if we look around thing is in balance, following certain rule ; other than humans because its has free will , it can make worst decisions and good decisions. To guide human has

been given consciousness and send prophets and book and day of judgment is the main theme of each prophet revealation

Question is why, we need judgment, to provide the necessary balance, as you raised in your article if some one live a pious life vs a person like Hitler , do not one want to punish Hitler for what he did in this world to serve Justice for its action

I think Christianity struggle with the idea of suffering and heaven and hell because if Jesus died for every one salvation that it become illogical to have suffering in this world and similarly life becomes a moot point of of getting entry to heaven without doing any thing

In my understanding Jesus never preached this instead he was a prophet like many before him but once ideas like Original Sin and Trinity entered it become illogical and cause multiple issues

https://medium.com/illumination/jesus-is-sad-and-ashamed-926b0dc2b1a3

https://mfakhar2000.medium.com/monotheism-the-religion-of-all-prophets-5718c20ad0c1