When I was a teenager, I went to church, and almost every ‘Christian’ there was a complete asshole. What makes it worse is that they try to justify it. This honestly made me think that if God and Satan were real, I’d want to know Lucifer’s story. Maybe he’s not actually ‘evil.’
Anne Rice wrote an interesting book in the Vampire series on this, Memnoch the Devil, where the narrative is that Satan created a place for the souls to go that God otherwise would have extinguished in his cold hatred for much of humanity. Satan, who loved humans more than any other angel, rebelled against God’s harsh treatment of them, and was cast down as a result.