Then they did a terrible job of translating it to the final cut. I can market a car that I'm building as the best red car ever made, but if I buy the wrong paint and it turns out blue, I guess my marketing was full of shit.
The likely reality is they did all that to rile up the vocal culture warriors well ahead of the release of the show, so when it was (rightly) panned for being poorly written, they had a prepackaged defense ready to deploy, that being: all of the critics are simply racist / sexist. Just look at what all the evil YouTubers said before they even watched it!
dictionary.com:
"
Mary Sue is a term used to describe a fictional character, usually female, who is seen as too perfect and almost boring for lack of flaws, originally written as an
idealized version of an author in fanfiction."
Does not apply.
wikipedia.com:
"Usually female and almost always the main character, a Mary Sue
is often an author's idealized self-insertion, and may serve as a form of wish-fulfillment."
You'd have to be some sort of twisted weirdo for Galadriel's incarnation in this to be wish fulfillment.
tvtropes.com:
"This theory posits that a Mary Sue is
an unrealistically capable and virtuous character, one who simply lacks flaws and is depicted in an overly positive light."
Does not apply.
grammarist.com:
"A Mary Sue is
a character who has no weaknesses, who performs heroically and perfectly in every situation."
Does not apply.