How do you care for a partner with COPD that refuses to do any physical activity and shushes you and cuts you off when you talk to him?

I'm 44 and my partner of 7 years is 71 years old. He is now starting into 3rd stage COPD and refuses to do anything. He will not even get up to go to the bathroom. He uses on urinal. I get all his drinks. I get all his food. I empty out his urinal. I do everything for him he won't even go and take a shower. He takes baths in a bucket where he sits on the couch. He lies to me and says that he is moving around and doing exercises but he's not. Every time I make a doctor's appointment for him he has me canceled it out. He has so much anxiety from sitting in a 3X3 section of our home that he gets an anxiety attack if I move around him too much or try to clean up around him. He can't have people over from 20 minutes at a time without having an anxiety attack because he is forced himself in a tiny little space that is taking over his mind. He's not taking his medications as he should. He's either taking too much or too little. Last year we just lost her home due to back taxes and we live in a camper and now that there's no money or any he can't do very much his friends are no longer around and his family wants nothing to do with him because of his past and I am so burnt out. When I try to talk to him about it he just me up what cuts me off or belittles me or makes fun of me. He'll shut me up when I try to confront him over him lying about moving around when he hasn't moved a muscle. He is even gone so far as to take the remote control to the television and point it at me and push the buttons acting like he's going to turn me off like he turns the television off. Every single thing I do is never good enough for him he's always demanding more I'll sit back down after giving him his meal and getting them to drink and within one minute he's having me get back up for something else. I don't get a single day off. I don't get a single moment off. I do everything for him when he is in third stage not 5th stage. He should be doing it himself. He refuses to do pulmonary rehab. He refuses to do anything. I am at my wit's end he is downright abusive verbally to me and acts like a child anytime I bring anything up. He has actually sat there and says to me blah blah blah blah blah and covered his ears. He is 71 years old not seven and I just don't know what to do anymore I am so frustrated and hurt and scared that if I leave him then I'm going to be committing some crime because he's incapable of taking care of himself now. Is refusing to move around has made him weak as a child and his refusal to move from a 3x3 ft area of the home has made his mind gone to reality and anxiety rules his life all he knows is that couch and it's beyond my control now and I just don't know what to do anymore please anyone who has any suggestions it would help