I'm not seeing it the way you're seeing it, Drich. In Genesis, it's clear Abraham was redeemed through faith and adherence to God's laws. The hope is probably that many nations will arise from him, and the whole world will be blessed through him. Abraham, for all his flaws and weaknesses, comes out as one of the good guys in the Bible.
None of that is erased by also having a Superman figure in the Bible. And even then the stories aren't meant to serve as just simply entertaining stories, there are all sorts of lessons to take from them that the Israelites would've found valuable. And if that means having a boringly all-powerful Superman being do this and that, so be it. As long as the messages are clear and the lessons are valuable, that's how they derived their hope.
None of that is erased by also having a Superman figure in the Bible. And even then the stories aren't meant to serve as just simply entertaining stories, there are all sorts of lessons to take from them that the Israelites would've found valuable. And if that means having a boringly all-powerful Superman being do this and that, so be it. As long as the messages are clear and the lessons are valuable, that's how they derived their hope.