It sounds like a very tough situation to be in.
I listen a number of mental health podcasts... in a recent podcast a person asked the question whether they should reestablish a relationship with one of their parents, given what had happened to them in the past. The expert said they did not have to, they did not owe their parents anything.
On the other side, in a podcast about justice, a person can do things other think impossible. (This is the story of Rais Bhuiyan.)
The behaviour of your dad could have been the result or side-effect of his own upbringing. That might not make it easier, except to like the person but not their behaviour. And i am trying to be careful not to tell too much of my own story.
There is no right or wrong answer. Except that from reading your post I sense you are very nice, good, honest person and despite what might be hurled at you you find a way to move forwards. And that also means if anyone questions your actions, you can say it was only right or fair.