This might seem surprising, but I broadly agree with this assessment, except that I can't tell what "stereotypical PUA writers" might mean in this context. The "Red Pill" is a very distinctive subculture which is characterized by wallowing in misogynistic - and most often, just plain misanthropic - attitude!cynicism (I'm using Robin Hanson's "meta-cynical" taxonomy of cynicism here) about gender relations, relationships and the like. Its memes may be inspired by mainstream PUA and ev-psych, but - make no mistake here - it's absolutely poisonous if you share the mainstream PUA goal of long-term self-improvement in such matters.