No, it's not an act of white male privilege; it's an act of asshole privilege.

Believe me, I feel the same urge to run a red pen through plenty of the writing I have read on Medium.

The difference between me and this guy who wrote to you is that I have sense enough to vent in my private online journal about other people's bad writing, whereas this guy has no manners.

He apparently also can't tell good writing from bad. I can at least look at your current article and determine that there is no systemic problem with your writing.