One has to give up hope for justice.
I wish I believe in a God who would punish evil people (for example people who torture animals). Unfortunately, I have to rely on the (very) imperfect justice of men and that offers very little comfort.
What about people (including children) who have terrible diseases, those who die young, etc...with religion there is hope that they will have something to make up for their hardship.
Not having religion makes life very very sad and unfair.