Yes Ireaeus God suffers from all of the worst of human traits including egoism as you point out. God just can't seem to manage without the attachment of puny humans to assist him!
It was the story of Abraham and Isaac seen through the eyes of Kierkegaard (a theist) which made the penny drop for me and I became atheist. This tale is obviously an early moral tale from polytheistic times when heroes spoke and usually argued personally with their deity. The ugly human sacrifice account promoted an appalling morality which like the Watchtower's is not above ending your children's lives for the sake of fidelity to the cult.
God is the ego-maniac par excellence, his genocidal lust, homophobia, obsessive patriarchy, nationalism, war-mongering-- "dash all the unbelievers to death including infants" etc, is done with an evil vindictiveness and worse still, he wants perpetual worship for this!
Could it be that the powerless Judean peasants living under the political domination of a foreign empire, were projecting these traits onto an imaginary divinity who they hoped might save them from their oppressor? Could it?