Not specific to philosophers, but Contrapoints has a good breakdown of why the term "postmodern neo-marxists", which JBP uses a number of times throughout the book, shows a complete misunderstanding of modern philosophy. [1]

Not related to 12 rules, but Cuck Philosophy goes into JBP's lectures where he references postmodernism and again appears to completely misunderstand the fundamentals. [2]

[1] https://www.youtube.com/watch?v=4LqZdkkBDas (probably NSFW)

[2] https://www.youtube.com/watch?v=cU1LhcEh8Ms