It has been eluded a few times how cunning and manipulative Banner can be, both which could be attributed to his abuse. You adapt and find ways to survive. Your own form of conflict resolution. However, that becomes your norm when you have not learned other healthier methods. There are quite a few instances of Banner demonstrating what is capable of doing when cornered--Banner-tech, using others to achieve an end-goal, retweaking Extremis to attack Stark, the "Island of Doctor Moreau (Gamma Mutate Version)"--the list goes on. Betty realized this in IH, his manipulation, his lack of genuine regret. He takes a reactionary, defensive approach, and seldom does anything proactively.
The questions you raise definitely are connected to Banner's confession in the previous issue. No one has held him accountable because his narrative has always been "I am the victim". He remains in that state because he has control. If he decides to be a stable, healthy person who is attempting to heal from his trauma, he loses that control, that predictability. His father represents what he fears in the absence of control. So far, no one has been able to show Banner what he can do to find peace.
It's a Catch 22--the more control Banner exerts, the more he harms the people he cares about.
I wonder, if say Charles Xavier or Dr Strange were to work with Banner to seal up the memories of his child hood abuse and death of his mother into a "memory vault" in the back of his head with a "NEVER OPEN" sign on it and leaving Banner with the knowledge that his traumatizing past is locked behind it and that he must never open would help him?
Block out the memories with Banner knowing they must be blocked might help trigger integration with the Hulks