I only know Zeus
You know that guy with a trident? Is he the god of the sea? Does anyone believe he's reverent? OK! So should anyone or should they not make up a religion of Zeus without adding to it or making up their own rules: the only difference being that only Zeus is worshipped?
the guy with the trident was Poseidon, the god of the sea. Zeus was the supreme ruler of the gods and his symbol is the lightning bolt. He had powere over the sky and the storms. He represented the order, the law and the justice, yet most of the times he was not just at all. He spent most of his time chasing girls, trying to hide from Hera, his wife, who would then punish the unhappy ladies and their children. Many of his kids were heroes and he helped them in their endeavour. But there were also many difficult situations in which he didn't want to get involved (for instance, in the judgement of Paris, the goddesses had turned to him initially, but he didn't want this responsibility, so he assigned to Paris the mission of deciding who was the fairest among the goddesses). He was a powerful and revered god, but surely not an exemple to be followed! And that's why many mortals who made the same mistakes as Zeus were heavily punished by the gods.