Question

If the Greeks believed that the gods were supposed to be worshipped then why did they have negative qualities like Hera’s jealousy or Zeus’ unfaithfulness?

Answer 1

Okay, in any case "gods" in Greek were worshipped because of their power and their control over human life. Gods were once humans too and have human traits. Greeks believed that all their gods controlled different things.

Hence, your right answer would be, gods had negative qualities because they have humanized traits.

Hope this Helps! ;)