Many people think that Hades was defeated by Zeus and went to the underworld, but it is not. They drew lots to decide where to go.
Hades made almost no mistakes in his life, except that he robbed a woman on the ground as his wife, which Zeus, as a ground manager, did not stop.
And Zeus knew little about the underworld, but Hades knew almost the sky like the back of his hand. He belongs to. No matter what you think of him or his strength, it goes in one ear and out the other, and even feels like a fly buzzing.
He has death and sleeping god. Without Hades himself, these two gods would be enough for Zeus to eat a pot. Sleeping God can keep all beings and souls awake for a long time until their lives are exhausted. If God has infinite life, he can keep him in a deep sleep and make this God ineffective. What's the difference between a person who has fallen asleep and death? Death is the younger brother of Sleeping God, and Sleeping God is stronger than Death. Maybe if you can't kill him for a lifetime, you can sleep endlessly. This alone is enough to make Zeus fear. Hades disdained to deal with the gods on earth and in heaven. He only cares about managing things in his career.
In this way, if Zeus and Hades fight, Hades is fully capable of letting Zeus lose.