Struggling with my feelings toward my dad, need advice

Assalamu alaikum everyone, Please don’t rush to judge me. I do respect my father despite what I’m about to share, I just really need some Islamic guidance. When I was growing up, my dad had two sides-sometimes he was good, other times really difficult. He took a second wife when I was little, but we only found out when I turned 16. Living mostly with my mum and sisters, that period was really hard for me. Still, I tried my best to keep ties and be a good son. But as I’ve gotten older, I’ve seen more of his troubling habits. He’s cheated many people, borrowing money and never returning it, then cutting them off completely. He never buys groceries, just waits for my mum to cover everything. At home he barely talks or smiles, always acting like he’s the victim and making the whole house feel heavy-even though nobody mistreats him. He complains about every little thing. He lies all the time, you can’t even get a straight answer about what he earns. Almost every month we get another letter from some company about unpaid bills. Meanwhile, he sends all his money abroad to his other wife. It makes me so angry to see how unjust he is between his two families-even his youngest kids from each marriage are treated completely differently. Of course there’s love between us, and I know I owe him a lot, but being around him is so painful and hard now. I can barely stand it. I could write pages on all the dishonourable things he’s done lately. So I had a few questions: 1. Is it okay to make du’a asking Allah to let him live permanently with his other wife, if that would be better for us? 2. Am I sinning if I try to avoid him and keep my distance as much as possible? 3. Do you think my feelings are justified Islamically? Jazakum Allahu khairan for any advice.