Ok I'm gonna start off by saying that you using "sexist labels" unironically to help explain why you view the trope Mary Sue as a bad thing is incredibly cringe worthy due to the fact that it has absolutely nothing to deal with the clear and present plot hole that is in the force awakens.
Your examples of men in movies is also lacking in credibility. Bruce Wayne spent 12 years to become the batman, Steve Rodgers was a recipient of a super soldier serum which physically changed him into a super hero, and last but definitely not least, Luke skywalker, the son of Anakin skywalker who trained to be a Jedi for 17 years, had trained for 21 days with Yoda, how long did it take for Rey to use the force and become a "Jedi"? Oh yeah that's right 1 day with no training and no explanation.
do you see where I am going with this? she is clearly and quite blatantly a Mary Sue and once again the fact that journalists like you keep using buzz words like "sexism" and "misogyny" for a counter argument is incredibly stupid