I'd suggest he's a verbal humiliation player a type of domination and it comes in many forms. The sex isn't the main reason your there. I had several clients like this all high value, rude, critical and relish making offensive personal remarks. My main strategy is brick wall, can't argue with a brick wall. I don't respond to negative remarks.
My friend took me on a duo with her regular who was a verbal humiliation player. She charged him double normal rate for each hour. We ignored him throughout the restaurant date and disposed of him quick and efficiently during the sex part. Again ignoring him.This was my first head fuck client and I said to my friend '...wow your really ignoring him' ...she said '`Yes, he can say what he likes, we don't listen, order all the lobster and crab you want! We exploded his credit card which was ticking away behind the bar as punishment. He still had a horrid effect on me mentally as he was so skilled at mind fucking. I had a hideous nighmare that night! All the escort agencies had banned him too.
If you can build that brick wall, play him and take the cash. It's psycological warfare so why not
charge big 'danger money' ?