The big insight for Jordan Peterson was the value of obedience, and the moral need for the sacrifice of autonomy. The reason for Jordan Peterson’s bitternis is that he has not fully made the sacrifice. It is still a sacrifice to him.
He is married and monogamous and probably would condemn pickup artistry as socially destructive. I don‘t think contempt was implied; that might be your own projection. (I don’t personally agree with him on many things.)