May I suggest an approach to the surgeon that has worked for me? Make it about your needs and your body, not his work.

Something like, "I appreciate that you have confirmed that the [specific surgery] is healing and there are no problems with the [implant or repair]. But my body doesn't seem to be adapting like I expected. Would you please refer me to a Physical Therapist who can assess why, and recommend specific [exercises, therapy]? I don't want all this hard work to be wasted, and I really don't want to live with this pain."

Yes, you are sort of catering to his ego, but if the goal is to get well, maybe that's the key. It's a form of being your own advocate by figuring out what will get the provider to do what you need. If you are beyond dealing politely with them due to your frustration, perhaps write a note to the patient portal, and have someone read it before you hit send, to make sure you get the right tone.
Sue