How about you tell us what you are being told to do to the dog during a "cradle & massage" session.

That might give us a better idea. Frankly, I've never heard of this method but that doesn't mean anything.
I loved and was loved by a very fearful dog for 11 years. Through desensitization, she overcome some of her fears and we learned to manage things pretty well to prevent putting her (or letting others put her) in a situation that was too much for her. I know well the frustration and the desire to see your beloved dog get better. I guess it's just a matter of whether "better" is improvement or perfection. Libby would never reach "perfection" and it would have been an injustice to us both to attempt to force it one her. For example, she never overcame her fear of men but she did overcome her fear of children--to an extent.
Just food for thought: do you KNOW your dog was abused or is that an assumption based on fear behaviors? Many people assume a dog has experienced physical abuse because of their fear of men or children or whatever. Those fears can be present without any such prior abuse. We make assumptions and then feel pity because of those assumptions and then act on the pity which does not benefit the dog.