If Prometheus stole fire to give to humans. Why was he in trouble? Because could not Zeus lightning strikes on earth create fire? Kind of seems like punishing a person for doing what you do.
Zeus feared that with fire, humans would become powerful enough, maybe not to rival the gods, but certainly enough to stop fearing them so much, and to stop relying on them.
Zeus believed (rightly so) that humans who could master fire would undermine his power and control over them. This would be a threat to the stability of his rule over the pantheon.
He wasn't a loving god, and he never really approved of us to begin with. We were just playthings for the gods, created from the earth, but animated by esssences from the gods (tears, sweat, blood, I dont fully remember) and made in their likeness, with big intellects and free will, but smaller, like dolls.
Then the gods started breeding with the humans and everything went completely to shit.
Wow! This bears a striking similarity to some apocrypha (idk the plural). Where Nephilim (like Moses or Noah - don’t remember who, but it was the one who was very very old and had many kids with a young woman - was supposed to be one) are mentioned, giants, half-gods. And in order to be wiped off the face of earth, "the one and only" flooded the planet, but Noah built the ark and survived.