There are a lot of perceptive points in this article, some of which describe me as accurately as they describe you. But there is nothing in this article, or in the link in this quote, to connect perfectionism to white supremacy. Not that the link would make any difference. Something doesn't become true just because somebody put it on a website.

I know lots of POC who are perfectionists. Some of them have been my music teachers, and it is their perfectionism which has made them shining exemplars of their culture. Like any perfectionist sometimes they overdo it with the kind of toxic perfectionism you describe here. But in my experience, they are no more or less likely to overdo it than white people.