but no it isn't uniquely bad cause of terf writer

the video does mention that there is almost no positive representation of minorites, demonstrates that what little there is problematic, examples of JKRowling missing opportunities for good representation, and examples of JKRowling attempting to retcon representation in after the series was over. Then the video gives examples of other authors succeeding for comparison.

The video essentially says that the books series is like a Thatcherite monument to the status quo, which is reflected in the overarching story and (lack of) progression for most characters, which is to say, her ideology may actually be the root that which the rot stems from.