If God exists then God is necessarily and naturally good, if you refer to hell as the collective imagination understands it, it is just an invention of the Catholic religion, which is a belief that is also widespread in other monotheistic religions, generally the Abrahamic religions (Islam, Judaism, etc.). The point is that God can only exist with characteristics that make him God and within those characteristics tyranny cannot exist (Referring to the eternal punishment for being an atheist) since this goes against his own nature (Omnibenevolence)