Work on you... the rest will follow. It's not about fixing the marriage. It's about becoming the best you can be.
It's easy to point the finger and be angry at your spouse. It's easy to chalk up the injustices. It's easy to b!tch about him, his failings.
Next time he talks, listen. The guy is frickin' terrified of you, cowering like a puppy with its tail between its legs.
What is the message? No.. not that one. Nope.. not that one either.
The message is.. work on you. With a professional. It doesn't make you wrong or weak. It's using the appropriate tools to clear the pathway to meet your goals. And remember, denial is not a river in Egypt.
The apple does not fall far from the tree. Your mother would rather risk serious consequences than have an MRI, using taking care of your father as an excuse.