Feeling trapped in a toxic COVID situation

It's great when I tell my husband that I tested positive for COVID but then my MIL and my husband try to make me feel stupid because I decide to follow COVID protocol. My husband refuses to test and says he's fine, while he most definitely is displaying symptoms. I'm all alone in a stupid 5th wheel. Everyone else is running around like everything is fine, no one is sick. While he looks like he is going to die. He was whimpering and coughing in his sleep last night. I hate this family. I hate my husband for siding with his toxic mother. I hate how my own husband has been isolating me even before I got COVID. We haven't spoken in four days! This isn't him! He wasn't like this when were just the two of us. No one would ever believe me if I told anyone in the community about them. I hate this. I hate that I want to leave, when I know that's exactly what his mother wants. I hate that if I leave he will never see the toxicity in which he is living. I hate that I feel trapped. I hate that no matter what I say to him he will not listen! I can't break him out, and it hurts me so bad.