All of the self help material and psychology that I'm reading

I personally think that when one makes that effort to read on self-improvement to search for meaning and to find help to solve personal problems and in doing so, comes to terms with their flaws/imperfections, discover their strength, and come out learning to love themselves is definitely a triumph. While it is not a guarantee that it will heal your relationship with others, at least it will put you in a better place in terms of being the bigger person to have approached and tried to save your relationship. That is when you know you have healed, you took the bull by its horns and bravely made the effort. You know right from wrong.

One cannot choose one's parents nor change their flaws. He will have to confront his own demons to save himself and his relationship with you. Just remember that you have complied, tried, and made the move toward reconciliation. He, at this point, rejects it but it's fine, what he is and what he does, does not define who you are nor do you need his approval or love to live the good life that you deserve. I hope he changes and realizes that he has a daughter that loves him no matter what and I also hope you can move on and be truly happy. Good luck😊