Don't know that this applies to your W, just saying that some young women have the whole fairy tale fantasy about marrying her prince and living happily ever after. Little girls used to grow up being fed such things and leaving them with the idea M was suppose to make them happy.
Embarrassed to admit, I thought my H was suppose to make me happy. When he didn't, it made me pretty upset with him. I was very young and had a lot to learn about relationships. I was much older, again embarrassed to admit, when I started hearing how happiness was a decision.
So, back to your W, I take it you don't see it as being a situational type of depression.......like suffering over some type of loss. It's more like she has unmet expectations and desires, right? Is this the first time she has sought out medical help?
Chronic depression is tough to live with, and it's tough to live with the person who has it. I hope she will continue to seek help with this problem.
I do understand her eliminating what she sees as being the logical source of her unhappiness. I did the same thing when I had my first baby and was suffering post partum depression. I thought I would leave my H, find someone new, and live happily ever after. I was still very young and pretty ignorant about this subject.
How long would you say she has complained with unhappiness? Did it begin shortly after you were M? Did she ever tell you what would make her happy? Sometimes when women complain, the man takes it as nagging.......when really, she's trying to tell him what she needs. It may result with him tuning her out, getting in an argument, or her tears, but it boils down to bad communication.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!