Is Rey very skilled? Sure.
But considering all the stuff Luke and (even more so) Anakin have done with the help of the force I really don't find that Rey's competence is something we can legitimately criticize as being unusual in Star Wars.
Anakin flying a fighter in Episode 1? Even the crazy pod racing. Way before he had any training. Then being "the best pilot in the galaxy" and so on.
Luke's development was slower but oh well... he still managed to use the force to destroy the first Death Star. Unlike Rey he had zero experience with fighting or surviving. She was a scavenger, independent, athletic, smart. He was a fucking farmer who lived with his uncle and aunt at the age of 20-something.
Rey managed to hold her own against an injured Kylo Ren (nasty blaster wound for sure) and Kylo himself isn't fully trained and certainly emotionally unstable.
I don't see anything out of the ordinary for a Star Wars movie.
I'm just super happy we have a female Jedi-in-training (I guess)! Finally.

I feel like a little girl again.