I might have to LTB when this is over if I come out alive. Mine is x-smoker and frequently coughs. Goes out daily, but refuses to use a hanky.
When in the same room, covers his mouth with hand but then touches all sorts of surfaces. When on his own in the room, doesn't even do that. When I suggested he uses hanky or tissue, says if I don't like it, I can clean up after him! Can't isolate as stuck in 1bed flat. Relationship beyond repair anyway but this is the last straw.
Just leave!! If you have any other option just pack up and go. Leaving abusive relationships is allowed and I would certainly Say wishing you dead is abusive. Just go, if this is teaching us anything it's that life is short.