GGG not being able to handle criticism is part of their fragile personality. They do not have the flexibility and adaptability to to roll with the punches.
Now, it seems to me that there is a range of MLC from the relatively simple where they go through the stages, and come out the other side, to the complicated ones where they stay in MLC because they can't get out.
If your h wants to come out of MLC he will need encouragement, but it doesn't always work. That is the problem. We have to be brave and risk failure ourselves.
If you want him back (and that becomes increasingly problematic, believe me, however much we love them) then it is worth a good try and a lot of rejection along the way.
There are no formulas for this, simply things that can work, and other thins that actually don't.
Ultimately it is up to them - all we can do is try and help the process, and show them it might be possible.
The nice and nasty is the Dr Jekyll and Mr Hde that peple refer to. You never know which one is currently at home, and they can switch within a conversation, back and forth.
I would say your husband is very very conflicted, and his pride and fear are very big factors here. He needs to come back to rescue you, but there is always a risk he might resent the being needed. It is so hard to knwo, and very often they do not know themselves, at all.