Should someone break up with their abusive partner if they're the only reason they're alive?

To further clarify. The partner in this circumstance is a predatory woman who uses psychological abuse with the occasional physical abuse. Literally no one would believe the man if he told anyone because of society's double-standards and how often it allows female predators to get away with terrible behavior that would immediately damn a man. At least in North America.

But to make the situation even more complicated, she's also the only reason this man is alive. He doesn't know how to take care of himself and won't let anyone else take care of him...even if he had someone he felt he could turn to. This isn't because of his abusive partner either, without her he would lay in bed all day every day and let himself starve to death. If he got evicted because of this he'd just do the same in a gutter somewhere. She is the only reason why he's not dead.

So I ask you this, what do you think the man should do in this situation? Assuming everything is EXACTLY as I said.

Oh and side note, this isn't just a random hypothetical. I've recently encountered my 3rd male friend in this kind of situation. If either of us does anything to hold these women accountable for their actions they will most likely pretend to be a victim and weaponize society's support for real victims against us.