Isn't Zeus in charge of hades? Which is more powerful than Zeus?

Zeus overthrew the rule of his cruel father Cronus, ended the rule of the Titan gods and opened the rule of the third generation of gods. In forming their own system, the three brothers Zeus peacefully divided the heaven, the sea and the underworld. Zeus managed the heaven, Poseidon managed the sea, and Hades managed the underworld and distributed rights. It was decided by lot. All three brothers are strong.