My take on this is that there's no way of knowing, at least not in the short term, whether it's really for the best when two people decide to stick it out. Abuse is of course never the survivor's fault, but if his partner genuinely feels she can't continue under these circumstances, then perhaps it's best that she say so from the start, rather than limp along in a crippled relationship indefinitely. This way the two can both get on with their lives.
I'm not sure this will be of much help or support, but I hope it is. I think we all have a lot to offer a partner, but that partner has to be someone who can accept us the way we are, just as we have to accept them.
Nobody living can ever stop me
As I go walking my freedom highway.
Nobody living can make me turn back:
This land was made for you and me. (Woody Guthrie)