I don't think you understand, there are some physical things that you simply don't FIX.
Some physical changes are simply true changes to the womans' body. There are some medications women can try...my mother has tried some, but they haven't helped. Sometimes the changes in a woman's body affect her permanently, sometimes not.
When I read your post I thought..."he seems to view her like she's broken and needs fixing". CeMar, "if" the changes her body has gone through have affected her SD, "if" those changes truly are physiological....don't view her as something that needs to be "fixed"...that's insulting (if that's what you are doing).
If the changes are due to problems in your R, and I suspect part of them are due to a HUGE lack of communication and honesty...then YOU are duty-bound to start communicating with your W, or NOTHING will improve. She will not just suddenly wake up one morning and go back towards the woman you want her to be....unless you start being honest with her about what you want and how you feel.
I'm still waiting to hear what you've addressed with her and how you've addressed these issues. Have you talked to her about them and asked to go with her to talk to her Dr.? If not, why?
If you can't start sharing with us what you've tried, said, done (besides reading books on your own)...you've got to start expecting we aren't going to be able to give you a magic answer to your issues. Why is it you won't share with us ANY conversations you've had with your W? Based on your past posts...I don't think you will ever share with us what you've tried/done...because personally, I've come to the conclusion that you haven't done anything other than read books and look for fault in your W....you've avoided actually talking to her....just like you avoid disclosing info to us.