Since the content for the MC's father is optional and can be disabled, it doesn't bother me. I was there from the beginning and wasn't attracted to the idea of seeing someone other than the protagonist with sexual content. I still don't understand why it's necessary to invest so much resources into this optional content, something that most harem players, which is the game's players, don't like. That's why I think those resources are invested in giving more content to the protagonist of the story.
I think the main complaint all players have about the MC's father isn't that he appears on screen, but that he has sexual content as such and has his own harem (no one wants to see that), and those resources (girls, animations, etc.) could be assigned to the MC. Bradok's sisters, or rather, the MC's aunts, are super attractive, but I got the feeling they were meant for Bradok in his harem, and that bothered me because I would have liked them to be with the MC.
I think there would be no problem if Bradok only had in mind his mission to escape from prison and do what he has to do reigning or fighting or whatever his goal is instead of going around conquering pussy, if that happens I think nobody would mind seeing that optional content and it would even be somewhat refreshing to see Bradok appear from time to time and I would even say that he could become a beloved character if done right because I think that was the goal from the beginning when putting him on screen.