Yes, your latest posting does fill in some of the gaps. Now, I'm going to ask about you. What are you doing to take care of yourself and your family? Do you have hobbies, etc.?
MC may not help at this time. In fact, the MLCer uses the MC and IC as a way to "spin" their unhappiness to the point that they state that they are done and will not continue w/therapy. If might be best for you to attend therapy (IC) solo. The "trapped" feeling is one that MLCers do tend to state. In fact, they feel like they can't breathe when they are in the home. They feel like they are dying and yes, their old selves are slipping away while the child of the past rises to the top.
Please do not take what he says personally, as that is just how he is feeling now. He's depressed and desperate to find ways to self medicate to take that pain away. He can't face his life w/you right now because, in his mind, you are part of the problem. Trust me...it's not you, it's him.
Try to keep the focus on you and your family. If he talks, listen and validate. Do not offer up advice/suggestions unless he asks for them.
Bottom line...you are the adult in your household for now. Your man/child is out hunting for his past and may not return for quite some time.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.