User blog comment:Ngh93/What REALLY makes a villain a Complete Monster?/@comment-27818776-20150326235216/@comment-1672596-20150327221237

Except the concept is indeed very broken, irreparably broken even. In fact, several are labeled as CMs despite having some remorse or tragic backgrounds (Kefka in particular, at least in Dissidia, is technically not a CM thanks to his rather sad sendoff), and some are even considered in-universe as CMs despite being redeemed like Vader for instance (even Leia was unwilling to forgive her father, and she has at best semi-forgiven him, not to mention he was further tarnished as a monster even after death despite his redemption).

And for the record, when something is considered opinion (which CM, being a YMMV trope, is indeed that, opinion), that means it cannot be used as a category, which is strictly for pure raw facts, no opinions.