It seems to me you married a ultra-demanding, high maintenance type.

Also seems that you've bent over and backwards for her ever since you married, which made her think it's ok to act like a spoiled child when she should at least be thankful and considerate of your efforts.

Well, in my opinion, your options are: 1) take her to a doctor, run tests and see if there is really a medical explanation for that and treatment available, or 2) divorce and move on.

Regardless of what her problem really is, and whether or not she has a mental illness, you need to realise that you don't deserve the kind of treatment you're getting from her.

Most people stay with abusive partners because 1) they believe that they can fix the partner, 2) they believe that it will go away and the partner will grow out of it, 3) they have low self-esteem, no moral or financial support from family, friends or local authority to leave the abusive partner.

Seems to me that 3) doesn't apply to you, so...

One thing for sure is that this abusive relationship you're in is destroying you bit by bit, day after day. Either you wake up for the reality that people don't ever change and you cannot save them, or you're going to get ill yourself and eventually engulfed and consumed by her wrath.

Is that how you want to live the rest of your life?