>>5348155In the original Star Wars trilogy Luke sucks at saving people and doing things, he is a character almost always in danger and it creates stakes. He is saved by Obi Wan throughout the first film, saved by Han on the Death Star, Saved by Leia and Lando at the end of Empire, saved by R2 when trying to rescue Han and Leia, saved by his dad after he lost. Rey was almost never in danger with the exception of the first meeting with Kylo Ren. She is great at everything, Han Solo likes her, she can fly the Falcon despite stating she never flew a ship like it before, she is able to use the force to call the light saber to her something it took Luke like 2 movies to achieve, she overpowers and defeats if you don't consider him a master an adept force user, the son of Leia and Han trained by Luke in the force who idolizes his grandfather the most powerful jedi/sith ever after just learning of her connection to the force.
If you honestly don't think she's a Mary Sue, you really don't understand what a Mary Sue is.