You are going to have to give yourself closure. That will come from accepting him as the person he is today. I say this from experience having lived through my own MLC. He will probably not remember the things you would like him to apologize for. He is in a world you cannot imagine. You are expecting him to see it from a rational point of view. That just doesn't exist right now.
My children(1 adult)understand there mom is not the person they remember. She still says things to them when she does see them that are just "kind of nutty". They ask me questions from time to time and its tough hearing that sadness in there voices when they talk about it.
Peace, I will say this and not to be harsh, We are born as an individual and will die as an individual. We are not born together nor do we die together. Please allow the life you lived with him to die so you can start anew.
Believe me, I've been where you are. I tried to understand my EXW MLC. I understood mine after I went through it. My life is better for it but that is not the norm. The only other person that got to the otherside that posts here regularly is Wonka. That means that a lot don't.
So, create a life now for you. To say that a life well lived is the best revenge is true. It allows you to move on and understand you can't control other people. Don't get me wrong, if you want to stand then stand, if you want to move on then move on, but do those things for you.
My children know that I'm there rock. I can say I'm proud of the way I handled myself. Easy - no way(I was a freakn mess inside but kept that to me.) But now, confident - yes, content - yes, The life I thought I would be living - no. This life is difficult, give yourself a break.