How come the gods are drunkards, monster, or even childs? Because gods are not otherworldly entities that's always been - they are normal beings randomly taken into godhood.
Becoming a god is a curse. When lifted to godhood, one is frozen in time and mind. A child god is powerful but forever immature, wanting things on the same level as other five year olds - only with a shorter period of satisfaction. And a child god with a tantrum is a dangerous thing.