Just sending support your way, Sofa.
I was in pain for many years due to my mother's compulsive gambling, bipolar, and alcoholism. We children, as youngsters, suffered some amount of abuse at her hands. Learning to set boundaries and letting go was very difficult.
My message is that is never too late for anyone. My mother is now sober and (after losing two homes to foreclosure) gambling-free for a handful of years. She doesn't do AA, but has been with a loving therapist for about 6 years and is actually better - healthier emotionally, physically, and spiritually - than she has ever been in her entire life. She has forgiven herself, and is for the most part, at peace.
All the lessons we have learned, and are learning, in Al-anon still apply, with our parents.
(((Hugs)))