User blog comment:SayuriDarling/The Blood of Olympus Official Discussion/@comment-3146930-20141013211630/@comment-1820614-20141016020343

Zeus is that stupid in the Percy Jackson Universe. In most other versions at least when a threat to his rule arises he takes action. In myth, Zeus ate Metis and married Thetis off to a mortal to prevent a child being born stronger than him. He fathered Hercules specifically to fight the Giants and prevented the sun and moon from shining so he could locate a flower that would make the Giants invincible. In Hercules: TLJ,  Zeus had enough sense to recognize the gods were going to overthrow him and tried to recruit Hercules to protect him. In Marvel Comics, Zeus once a threat to him is made obvious he takes action. In the remake of Clash of the Titans and its sequel,(and I dislike both), Zeus at least figured out something had to be done about the gods' waning power and the threat of Tartarus. And in all of those and in other versions, Zeus at times shows a decent side and cares something for justice.

Riordan's version is the only one I know that when a threat to him arises Zeus sticks his head in the sand or makes the worst possible decision time and again. He is also the only one who tends to be so narcessitic to the point it ruins any decent moment he starts to have.