Kendall,
I can not imagine going thru this ordeal with a stubborn, negative patient. It was hard enough with a very cooperative one. I will give you with any H&N patient, that there will be moments of negativity but your husband actions are basically suicidal. I support you in your unwillingness to enable this behavior.
I am not sure there is an answer since it seems you have called in all the professionals to get him back on track. Is there someone that he respects that might help turn the corner???...sometimes we caregivers are too close to the situation. I tell you truthfully, if my Bill had acted this way, I am not sure I could have stayed the course...it trully tests your marriage vows.
Thinking of you,
Deb