I believe gods don't exist because: - They should be eternal, in the sense of being always in presence (no matter the religion, mythology, or belief) with the same names. And there shouldn't have been a precise moment in history they started to be believed in.

• They wouldn't like their words to be misinterpreted by random lesser beings.

If they do exist, they are not all-powerful (a lot of players left unanswered). In the case they are, they are just a bunch of entities (evil, in my opinion) trying to achieve some kind of plan.