She makes plenty of mistakes. They are there in each of the movies. She does not perform perfectly any more than Luke did. That is the role of the hero. They have to succeed more often than they fail. Rey fails big when she unleashed the force lightning. She is lucky she was trying to stop the wrong ship.
She’s an underwritten character. I guess maybe she makes mistakes (can’t think of many). But as with her using force-lightning on the ship, her mistakes never seem to have any real consequences. Guess she’s just “lucky” that Finn mixed up the ships.