In several places in the Old Testament it is clear that the God of the Israelites was jealous of other Gods. He said "Thou shalt have no other Gods before me". He recognized that there were other Gods. In His jealousy, he wanted to be seen as the chief God.
As for evil, God specifically said that He creates evil.
Isaiah 45
6 That they may know from the rising of the sun, and from the west, that there is none beside me. I am the LORD, and there is none else.
7 I form the light, and create darkness: I make peace, and create evil: I the LORD do all these things.
