Two honest questions for you:
1. How many times have you watched the film at this point? Just the once, or more than once?
2. If the subsequent films show Rey's limitations, explain the source of Rey's power, and show her doubts, fears, and growth, would you still consider her a "Mary Sue"?
I ask the first question because it may simply be that you missed the attempts to show Rey's own surprise at her abilities or her confusion that not everyone has those abilities. As I've said, the best examples I can think of are where she and Finn are jubilant after flying away on the Falcon, and her reaction to figuring out how to do the mind trick.
There's also the scene where (if memory serves) she acts surprised that Finn can't speak droid, implying that she doesn't realize her own abilities are special.
Lastly, there's the final fight with Kylo Ren to consider. At the opening of the fight, Rey does get her ass handed to her. (Or, rather, she gets Force-blasted into a tree and knocked the f--- out.) Also, technically, it took four people to even neutralize -- not kill, neutralize -- Kylo Ren. It took his own internal conflict at killing his father, it took Chewie's already-demonstrated-to-be-super-powerful bowcaster shot to the gut to stagger him, it took Finn wearing him down at the start of the fight, and then finally it took Rey fighting, losing, and then somehow calling on the Force (in a way the film suggests she doesn't understand) to beat him. Not exactly a "gimme" of a win. More like a "by the skin of her teeth" to me.
However, I absolutely concede that this stuff happens so quickly that it's easily missed. In the Falcon scene, Rey and Finn just seem happy and are kind of talking over each other. In the "you don't speak droid?" scene, it goes by in an instant. In the "and leave your gun!" scene, again, it goes by quickly. And with Kylo Ren, it's all intercut with the X-wing shots and happening really rapid-fire. I think that, in this sense, the pacing of this stuff may not have allowed these moments to register for a lot of viewers, and that's certainly one of the film's big flaws (albeit and understandable one, from my perspective, if you want an under-3-hrs film).
1) I saw it the Thursday night it opened, and hated it. I walked out of the theater crestfallen, that the filmmakers had screwed up so badly, squandering an opportunity to make something truly special. Not ANH/ESB special...I knew that was unrealistic. But something special, nonetheless.
I loathed the idea of sitting through it a second time, but I did, to try to give the film another chance. To try to pick up anything I might've missed the first time, in the hopes that it was better than I thought. My second viewing was about a week after my first, and after I walked out of the theater that second time, I was slightly less depressed, because much of the shock of it being so awful was gone (having already seen it). But only slightly. I still cannot believe what a wasted opportunity it was.
As a lifelong film buff, I am a very observant film-watcher. I did catch all of those examples you cited, plus the one IP cited, during my first viewing. And I think Daisy, whom I adore, did a fantastic job delivering every last one of her lines. But the modern pacing of the film, of which I am not a fan, was such that there was little to no time to digest what she was saying, per the writers' attempts to convey to the audience that Rey is as astounded and nonplussed as the audience is, regarding her unprecedented facility with the Force. I heard the attempts, but they were overwhelmed by the pacing.
But even if the pacing was more chill, to allow that stuff to sink in, I still don't like the idea of her being so powerful so quickly. No training, and too little struggling, sacrificing, fearing, and failing. Why does everything in Hollywood movies have to be bigger, faster, badder, louder than the films they get their inspiration (and in the case of TFA, their complete story) from? I don't like that the JP filmmakers felt that T.Rex is no longer big enough or bad enough, that they have to concoct an Indominus Rex! I don't like Rey (regardless of her sex) being without flaws, rollicking through the adventure with such ease and fearlessness. She's not relatable. She's not believable.
I don't care how banged up Kylo was, he should've destroyed Rey in that fight. This idea being propagated by Hollywood and the media that women are just as strong as men is absolutely absurd. Tell me, how many women are in Major League Baseball, the NFL, the NBA, and the NHL? None. Zero. Zip. Zilch. There never will be a woman in any of those top-level men's leagues, because women are physically inferior to men. Period. Now, I realize Rey lives in a make-believe world where the Force is a great equalizer, but this is all the more reason to show her develop her abilities, before taking on a highly skilled darkside Force villain in close one-on-one combat. But no, a teenage girl can beat down a near-Sith Lord with a weapon she's never wielded and he's highly trained with, just like Ronda Rousey can beat up Floyd Mayweather. Yeah right. You're correct, Dan...Rey is Buffy The Vampire Slayer. Which was fine--awesome, actually--for a campy TV show. But not for Star Wars, a film that's supposed to have a gravitas to it, and relatable and believable heroes and heroines.
2) If the subsequent films show Rey's limitations, explain the source of her power, and show her doubts, fears, and growth, will I still consider her a "Mary Sue"? It's difficult for me to speculate on that, but if forced to, I'd probably say she was a Mary Sue in Ep. VII, but a flawed heroine in Ep. VIII, etc. I don't know if it will retroactively alter my opinion of Ep.VII. And if it does, I gotta tell ya, Rey being a Mary Sue is one of MANY problems with TFA. If we learn about Rey's unprecedented powers, see her flaws, and witness her growth in Ep. VIII, that will be good, but none of that will change the fact that I hated all of this:
* story is an uninspired, lazy, and cynical ripoff of anh (this demerit alone could fill a page if i broke it down all the ways it ripped it off--but i'll spare you)
* the soundtrack sucked
* ford phoned in his performance
* i didn't realize carrie fisher was a ventriloquist
* chewie mask wasn't right--looked cgi--not a hair outta place--too small--head wrong shape--eyes looked cgi'ed at times
* chewie acted out of character, in egregious ways
* cgi monsters were totally fake looking--that whole scene was embarrassing to watch
* distracting scottish accent
* unnecessary characters (finn: necessary for the agenda, but not the story)
* boring cantina creatures
* poor lighting
* chewie's way underplayed reaction to han's death (he shoulda been ripping stormtrooper arms outta sockets!!!)
* leia snubbing chewie
* chewie's adoring look at rey in cockpit en route to luke...it was cringe-worthy
* poor editing and breakneck pacing
* telegraphing plotlines
* falcon taking no damage (it shoulda been in pieces--regardless of shields)
* ridiculously heavy-handed parallels to the third reich
* hux--annoying as hell
* kylo face reveal premature (shoulda happened on catwalk w/his father)
* kylo helmet heavy as an anvil--so stupid
* driver was miscast (his acting was fine, but he looks nothing like ford or fisher)
* solo and finn spot rey across a huge expanse, and then boom, they find her around a corner
* levity misplaced in perilous moments/scenes that should've been fraught with tension, thus removing all tension. so cartoon-ish.
I know I'm forgetting stuff, but wow, add to all that my gripes about Rey's infallibility, and well, can you see why I didn't care for this picture?
The Wook