If you have no choice but to use him call Disability Rights in your state and tell them about his attitude. And how he treats his patents. DR is a patient advocacy organization.

Google his name and under reviews, state what his attitude is towards his clients and say you do not recommend him. Don't swear or use vendetta type words, just state that you have seen him being disrespectful and rolling his eyes towards patients.

These are some options available to us, you are right many times people disregard MI concerns. But we don't have to be completely powerless.