I don’t like the ST myself, but the Mary Sue argument is very silly and indicative of one’s attitude towards women. “We don’t hate women, we hate poorly written characters” doesn’t apply when a person defends the prequel trilogy over these films.
What about someone who doesn’t prefer to PT over these films? I agree the characters in the Prequels are bland and make strange decisions for the sake of the plot. However, I would also argue that Rey is overpowered, like how Anakin the 9 year old destroyed the trade federation ship at the end despite professionals failing to do. Whether or not she is female is irrelevant.