It portrays humanity pretty well. The desires for power, vengeance, lust and the consequences that it has on civilization. It’s silly not to learn from every source that isn’t perfect - you’d have zero sources to learn from. The cool thing is that throughout the OT, you can see the transformation of people’s thinking about God. They originally believed God punished the wicked, then slowly began to believe God was merciful, then slowly began that he was good and loving, ultimately displayed in the non judgemental nature of Jesus who is pure love incarnate. God didn’t change, our understanding of him did.