I see a lot of myself in your description of your wife, and so admit I am somewhat subjective, but I hope an alternate perspective may be of value nonetheless:

From your initial post, I gather that your partner is naturally very caring but has a personality disorder that does not allow her to handle frustration. She regrets all she does to hurt you, is turning to God for help, and yet is incapable of changing NOW, which is what any loving partner obviously wishes could happen. But it can't. If you can't live with this reality, then for both your sakes, you need to let her go.

HOWEVER...

Just because your partner has issues that are tough for you doesn't mean you should abandon her until she becomes the "perfect" mate. There is no perfect partner; every person has issues you won't want to live with.

If you do want to continue a relationship with her, perhaps you could get help to learn not to take what she says and does personally, because while you seem upset at how negative she is, you are focusing mostly on her negative aspects, too, which is only feeding her problem and helps neither of you.

If it is any encouragement--through the support of my husband, I have gotten through a lot of my issues. I am still working on many, and I know I still hurt him sometimes, but overall, I think we have a stronger relationship than most people. Not all guys can handle these kind of stresses, but if you and your love are strong enough and if she's willing to work on them, then I wouldn't say you'd have to necessarily leave her.

Good luck as you figure it all out!