Name one character trait of hers that isn't "good at everything and pure of heart". Seriously, try. Enthrall me with your acumen. I'll wait as long as needed to let you formulate your excuses so I can rip them to pieces.
She mastered flight, force skills, how to operate and repair antique ships she never seen before, and beat trained Jedi-types at lightsaber and Force combat,all while having no access to any of basis of those skills in her improvished life on Jakku.
Every good character loves/trust her. Resistance trusts her with a sensitive mission within 5 minutes of meeting her. Leia hugs her instead of Chewbacca when she hears about Han's death.
I could go one, but I think you are sufficiently enthralled.
Self-deluding, fearful of abandonment, idolizes people she knows nothing about (Han and Luke) while being quick to demonize people like Ben until shown otherwise. Believes in the Force but misunderstands what it means to be a Jedi. Doesn't actually ever accomplish much besides mind tricking a Stormtrooper, beating Kylo Ren while he is traumatized from killing his father and holding his guts in, and lifting rocks. Literally lifting rocks.
And before you start comparing her to Anakin and Luke, since I bet you're eager to do so since you're so sure Rey is a Sue you smartie you, let me counter you ahead of time: Anakin blew up the Droid Control ship at Naboo from the inside when he was 9, singlehandedly ending the Invasion. When he was nine years old. With no Jedi training. None.
Luke made an impossible Death Star shot without a targeter after being told to use the Force by Obi-Wan's ghost. Know what sounds familiar? "You need a teacher! I can show you the ways of the Force!" "...The Force?"
And now you're gonna say something like how Luke was still weak for much of Empire and needed training. And I'll say you're missing the point, and need to watch the movie again. Luke became powerful the exact instant he stopped doubting himself. "I don't believe it." "That is why you fail."
It's right there in the movie. I'll wait while you go watch it again, since you clearly need to.
The Force is not your masters course. It is not a degree you study for to pass the test. It is a matter of belief in something greater than yourself and your willingness to submit to or dominate it. Your ability is defined by your will, nothing more and nothing less. As Qui-Gon says, "Your focus determines your reality."
Luke's focus in the OT for a long time was held back by his doubt in himself and the Force. When he overcame that doubt, he also found the wisdom to see that nothing was impossible - including the redemption of his father. That's why Luke can do what he does in TLJ.
Rey's focus is said outright in the movie, though it seems I have to repeat it for you. I'll go slowly: "The Force is a power that can control people and move things."
And that's exactly how she has used it so far. And Luke says how she is absolutely wrong and looking at it the wrong way, just like Luke used to. But you seem to think it's okay for Luke but not for Rey because powerful and likeable female equals Sue to you. You throw Sue around like a teenager who's learned to swear, heedless of context and necessity. Read more and watch more media, you have no idea what a Sue is much less how to define one.
Finn likes her because she is not in the First Order. BB8 likes her because she saves him from getting junked. Han doesn't like her until after she proves her worth - and Chewy likes anyone Han likes. The Resistance trusts Rey because Han Solo, the Rebel legend, says she's fine and is willing to help and a ragtag band of rebels doesn't turn their nose up at that. Y'know, because they aren't idiots.
She beats Kylo Ren while he is suffering from a gut wound from a bowcaster that sent stormtroopers flying through the air. While he is explicitly weakened in the Force from killing his father - Last Jedi outright says so, via Snoke. Her combat training is from living alone on a hostile planet, which she clearly exhibits. But I guess you need me to say this since it's rapidly becoming clear you don't have eyes and access to descriptive audio to have the events on the screen explained to you.
She flies the Falcon because it's in the junkyard of the guy she explicitly works for/sells scrap to and who she explicitly helped work on. Implying, you know, she has some knowledge of how a fucking ship works. Also Luke gets into an X-Wing in New Hope and flies like it's nothing. Oh and Anakin flies a Naboo fighter in Phantom Menace with little difficulty and being the one primarily in control of the fighter.
Leia also gives Han and Luke a medal instead of Chewy at the end of New Hope. Maybe she's a little racist. Maybe she hugs the obvious distraught newcomer rather than the old friend who is used to death and loss through war because she knows how to prioritize, isn't that a crazy thought?
So far you haven't impressed me. Maybe watch the movie you're trying to critique, read up on Sues, read up on Star Wars in general, and then come back and talk to me. I'll be waiting.
Edit: Maybe you'll have something snappy to say next time instead of repeating my own words back to me. Truly a devastating comeback; did it take you a while to think of it?