Good questions. If we're going by Oxford's definition of "stop feeling angry or resentful", I think the PTSD is here to stay, along with other facets of my personality and life which will always remind me of my experiences. Past that, I have made peace with my life, because that's the thing I'll always have to grapple with. Otherwise, I would just be so bitter... Instead, I focus on how statistically lucky I am to still be alive.
But I have no intention of speaking to my father or grandfather ever again. As for my mother, I laid out clear terms for what it would take to begin communication with me again, and she responded about as narcissistically as you can imagine... So I have made my peace with that as well. She's in prison now and I have no plans to reach out to her while she's in there. She lied to me about the situation, lied to me about the case, and lied to me about the sentencing. So as far as I should know, she's not even in prison. I had to pay the local clerk of court for access to her court documents just to know the truth.