Yeah, I think I recognize the situation. I can tell you that your situation reminds me a bunch of my Father and his behavior toward my Mom.
I'll just say this. I firmly believe that spouses have a marital duty to help each other when one is ill. I do not believe spouses have an obligation to remain in an abusive situation. And one an ill spouse bullies their partner with the kinds of manipulation tactics that I suspect are going on, then you are ethically allowed to remove yourself from the abuse. I'm going to give you some examples of things the Therapists and Social Advocacy people gave my Mom as suggestions she should do. Then I'm also going to tell you that my Mother was never able to gather enough courage to perform them, and as an effect my Father sent my Mother into such a destructive state of Depression, Anxiety, Exhaustion and Stress that he nearly killed her -- while the rest of the family looked on helplessly. And when I say nearly killed her I don't mean that as an exaggeration. It has been over 10 years since my Father passed away and I would say psychologically, she still has never recovered her mental health.
I can tell you that the social workers and advocacy repeatedly advised my Mom that when my Dad's behavior got out of control, that she should simply call for an ambulance to come and get him, and then not accompany him to the hospital and not agree to accept responsibility for his care back at the house unless he would promise to control himself. It is considered abuse to leave an ill person helpless … such as on the couch unable to move….. messing themselves and not being able to get to food, water, and medication. It is not abusive to turn the elderly or sick person over to outside medical care and distance yourself. Please note the walks away parts. Your husband needs to know that if he wants you as his caregiver, there are behavior expectations that he will abide by, or you will walk away.
Some things to say:
1. I am willing to help you but I will not stay in a room where you are screaming or calling me names. I will be back in 20 minutes (walk away).
2. I am willing to help you but if you cannot transfer yourself from Couch to Wheelchair and Wheelchair to Bed as the therapists say you can do, then I cannot accept responsibility for your care. I will be calling the Doctor in the morning to arrange nursing home admittance. I will be back in 30 minutes to check on you. (Leave him food, water, his medications etc and walk away. And if he gets completely out of control, call an ambulance and then don't accompany him to the hospital.)
I hope you're okay this morning.