Exil step-mother dead now Dad (70M) wants to get back in contact with me (19F)

There is a hell of a lot of context so you're gonna have to stick with me here.
My parents divorced when I was around 12 but even before then my Dad and I weren't really that close. For the first couple of months after the divorced it was great! My dad made time to see me, he only lived 20 mins away and we were closer than ever. Then he met her. They met through mutual friends. She was a widow, 9 or so years older, and lived 6 hours away. At first I was really happy my Dad had found someone and immediately a couple weeks into them dating I met her. She made lewd innuendos in front of me about what they were going to do later, spoke over me and refused to eat anything at the restaurant I chose because she "doesn't like Spanish food". A month or so later I get a call from my dad saying that he had moved the day before to where she lived and, therefore, couldn't meet up that weekend. He told me AFTER he moved.
Cue the next couple of years of her passive aggressively hating me at any family event and me only seeing my Dad twice a year as she cut his contact time down with me. At one point (~15 y/o) she made my Dad leave me behind at my niece's christening so I had to go around asking for a lift back from the church. My two half-brothers (from my Dad's first marriage) even staged an intervention to try and get her to improve her behaviour to me.
Then I came out as a lesbian.
I came out to my Dad alone when I was 16 and he said he was completely fine with it. The next day she calls me up and says things that still scar me to this day. I have been incredibly lucky to have never faced that level of angry homophobia again in my life but it was horrific. My dad let her say these things to me whilst he was in the room. I am very lucky that my half-brothers/ other extended family just completely ripped into him and cut off contact with him and I built myself up again.
3 or so years pass and I get a call from my Dad saying that she had passed away from cancer and that he now wanted to get back in contact. I talked to my brothers and they have both met up with him to see what the situation is. She left him penniless they got married (secretly) but she left nothing to him in the will. He has been burning through cash like crazy to impress her and now has no job prospects, no family, no money, and no permanent home (he has a house for the next 2 years but nothing after that).
He's getting older and I don't know whether I'm going to regret not getting back in contact with him. He seems apologetic but I don't know whether that's enough for me to forgive him.
TL;DR homophobic step mum is now dead so dad wants to get back in contact but idk if I can forgive him.
EDIT// he also tried to steal my savings a year and a half ago but luckily was able to get it all back before having to go to court


Source.