Hating on a major branch of leftist thought isn’t technically anti-all left, but it’s still left punching. Trying to say Marxism-Leninism isn’t left is just purity testing nonsense.

I dunno, if you consider yourself a leftist I think you’d be doing a much better service attacking right-wingers, especially now that there’s a huge rise of literal Nazis in Western countries, than attacking branches of leftism you personally disagree with. It’s entirely understandable why people would question your motives if you decide to dedicate a good portion of your personal time to anti-communism.