I remember reading somewhere about how Khmer Rouge cadres had to beg Soviet journalists and embassy workers in Phnom Pehn to give them newspaper clippings and such so they could learn some Marxist-sounding words in order to impress the Chinese, that's how poor their grasp of theory was.
KR is what you get when you base your movement on vague idpol like "decolonization" that is divorced from materialist analysis. It comes as no surprise that Pol Pot studied in Paris and was likely influenced by the New Left. KR's abysmal failures aren't a condemnation of ML or "nazbol" but of ultra-leftist wackos, idpol SJWs and Sakaists who are more interested in declaring random things like measurements "colonialist", "white supremacist" and destroying them, instead of realizing a constructive socialist project. KR's campaign to destroy hospitals and French medical equipment because they were "colonialist" and replace them with medical corps consisting of uneducated teenagers doing "true Khmer medicine", for instance, perfectly mirrors modern "science is white and Eurocentric" retards.
Instead of trying to defend KR or saying "it was wrong communism" or something we should take it up as an example of where ultra-leftism and idpol take you.