An "ist" with no "ism"

Spare a thought for the predicament of one John Gray. He is a philosopher and writes endlessly all over the place. The principal thread in his writings is a contempt for anyone who ever tried to write anything about how we might better live together. He shows utter disdain for all and every "ism" under the sun. Now I am as reluctant to subscribe to an "ism" as anyone and happily live with that, but poor Mr Gray, (perhaps from being a philosopher) has to be an "ist". His huge problem is that he is so destructive and disdainful of so many that he has nowhere left to go! He must have a system but can't find a system to suit!  Another argument against being an ist.