Father-Son relationship
Your question is written with admirable/praiseworthy composure. The impression is you have practised the Dhamma very well; particularly from an originally challenging place.
I have previously answered a question at this link about the attitude towards authority figures found in the early scriptures.
Related to this, the scripture Iti 74 refers to the kind of son that is spiritually &amp;/or morally superior to their parents.
In summary, the early scriptures are all about mutual obligations in relationship. While your compassion towards your father appears admirable, in Buddhism, there is an expectation a father must also abide with appropriate conduct before receiving full respect.