I would prefer if he found a way to turn the doctor's own methods against her. In ancient myths, her level of hubris always led to a fall. If it was a person of virtue, it was a tragedy; if it were someone as vicious as her, it would be a comedy. That's what Aristotle said, anyway. Our protagonist isn't the sharpest knife in the drawer, but it would be edifying if he would realize that he has one thing that the doctor wants more than to turn him into her slave. She desperately wants to keep that 100% success rate that she so brags about. He holds the key to that success, and can withhold it at will. He really can walk away at any time. He already did it once, in the girlfriend ending. That ship has sailed, but another path where he realizes the extent to which he has this to use as leverage could be entertaining. Of course, she would probably find a way to knock this down as well but that's the kind of game this is. Holding onto a marriage that is clearly and completely lost is our MC's tragic flaw.