Been on a pretty long vacation at almost 2 weeks. Almost no internet access. Had a lot of realizations and magical moments that would translate well in paper. As RedMage may remember I uh... of course didn't write anything down.
All in all, it sounds small. I feel refreshed, inspired, but sitting down is a bit hard to do yet? Must have done only 1.2k words since i came back yesterday.
Welcome back! It can be hard to get back into the groove, even if you were going strong before the time off.
Not every story is for every reader. Some people like higher reading levels and feel anything lower than that level is too hard or too simple (say, older teens vs college grad vs younger teen). For instance, I like the concepts of a large number of middle grade (MG) fantasy and scifi. However, the execution, the story itself, is often written at or plays out at a level too young for me--because I'm a 40 year old adult! LOL. Of course it can be too simple and straightforward. Other MG books (that is, their authors) do a wonderful job of writing a story that's entertaining and accessible to their target audience of 10 - 14 year old kids, but also entertaining to adults.
In short, don't let that reader get to you. It's just not a story for them. But if they're a friend, keep talking to them. You may have another story in the future that is right for them--I've experienced that with my own friends. Supportive of me in my writing, but they don't like my stories themselves. Then I had one that they loved and suddenly they're into some of the others as well, as they can see them in new ways.
Theocratic cyberpunk? I'm not into cyberpunk, but that mashup sounds interesting. I'll definitely be talking with friends who are fans of cyberpunk
As for Adult or YA, I've learned from former members here at SFFWorld that those are market categories rather than genres. However, people often treat "adult" as a market (for readers 18+ and even older teens), but they treat YA as a genre like fantasy, scifi, mystery, romance, cyberpunk, etc. I even see that in sites like Duotrope which lists various story magazines, anthologies and so on for authors to submit to. I'd say that your girlfriend may find your voice and writing style with word choices and plotting and such in that story to be similar to YA books she's read. That doesn't mean it is YA.
Also, Adult does not equal blood, swearing and sex. YA does not equal the lack of those things. The only requirement for YA is that it's primary protagonist (maybe the majority of them) is a teenager. Adult market stories may have protagonists of any age. Further, like Adult books, YA has a large range of narrative styles and tone. Some are very clean and family friendly. Others deal with or feature sex, drug or alcohol or physical abuse that's shown in explicit detail, and other topics that many cultures consider to be very adult. That can include deep explorations of philosophy and religious principles.
So, again, don't let the feedback get you down.