Since you are 55, I’m guessing that your father is in his 70s. I suggest you give up on dad. You are not going to change him at this stage of his life. He sees no reason to engage in treatment. He isn’t likely to give up his controlling and abusive ways.
Instead, focus on supporting your mother and yourself. Your mother probably needs both legal and psychological help. I don’t know enough about resources in Lebanon to offer direct advice. I hope there is a way to extricate your mother from the situation that prevents your father from tracking her and making her life miserable. She deserves to have some peace in her senior years if she wants it.
As for you: I’m sorry that your father has been able to dominate your life for so long. You’ve done what you can for your father. Can you now just turn your attention to yourself? It is pointless to wait for him to show you the love and support that ideally a son should get from his father. From what you shared in your letter, the generous times don’t compensate for the abusive ones. His idea of a relationship is one of control, not love.
It’s sad but true that not everyone gets the parents they deserve. Cultivate friendships with other men you respect and admire to fill that place in your heart. You may live another 40 or so years. You can choose whether the next decades are filled with more madness or peace. If you need support, do try to find a therapist or join an online blog. PsychCentral communities offer good advice and emotional support to their members.
I wish you well.