It’s true that all men were created equal. But God chose Abram in Genesis 12:1-3 and gave him a special blessing. He also promised Abram that he would bless the people who blessed him and curse those who cursed him. Our creator God has set up two unequal people groups.
Also, in Genesis 9:25-27, God our creator set up four more people groups, one of which will be a slave to the other brothers.
God did this, and it is in his holy word. I would be extremely fearful of trying to explain it away.