Available options include:

Believing in an evil god.

Not believing in anything beyond physical reality.

Not paying attention to reality and believing whatever delusion you feel like.

Most people choose option 3.

This is a classic argument called “the problem of evil” which says if God exists then why is there evil on earth, implying He should intervene otherwise it means God either:

is not able

is evil/not good

simply doesn’t exist

The Muslim answer is that this short life is a test and the real eternal life will be a reward based on how we lived and submitted to God. The harder the trial, the greater the recompense. This means the rapist will be held responsible for his wrongdoing and is given eternal hell. Responsibility starts around the age of puberty, when a person starts knowing how to differentiate between bad and good. So children who die before that are given eternal bliss.

Atheists, who do not believe in God and yet talk about him by picking and choosing which concepts they want to include in their caricature and which they want to ignore, often present this straw-man and conclude: therefore there is no God.

In your paradigm this life all there is: there is no afterlife, therefore no consequences. Which means that evil doers get away with whatever they did in their life. Hitler? He ended his life and so he got away with what he did.

So of course in your worldview where there is no possible justice you are pessimistic and do not understand when a person stands firm regardless of the tribulations he/she is facing.

Sounds like you're saying that children dying is the good ending...? And, that Hitler being forced to hide and shoot himself in a bunker while his evil empire was ripped to shreds was getting away with it unless someone believes in your version of god?

So, you're clearly in some demented version of option 3, the most common option, as I outlined.
Maybe option 1 with the whole child death thing though, idk...

Sounds like you’re saying that children dying is the good ending

In your world view life is unjust and there is so much evil (you explain it otherwise but you agree there is evil). So in all objectivity would you want a child to live long and suffer?

Hitler’s life ended in the blink of an eye and he has no care for whatever remained after him as he was no longer there. In your version of the world, he just ceased to exist. What did he pay as consequences then?

Care to defend your paradigm?