I've met some pretty...hardcore, let us say...Star Trek fans over the years. And I will leave it at that. XD
I think the problem is that you're not hanging out with real Star Wars fans. I know that sounds arrogant, but I've never met a real--meaning someone who loves the universe itself, not just the movies--Star Wars fan who hated the prequels. Most of the people I meet who open with "Man, those prequels are bad, amirite?" are 'fake' fans. They want to be nerdy, or pretend like they're huge scifi fans, but probably don't know Picards last name, let alone the homeworld of the Wookiees. -_- So they pretend by using Star Wars buzzwords, since pretending to be a Trek fan is a much more difficult process, and might push them over the border into being actual nerds.
They also usually say stuff like "Yeah...but Han Shot First!" as if those two phrases are the ID card ushering them into the nerd club. I know this because my sister, a huge Harry Potter/Game of Thrones fan but otherwise largely mocking of nerdiness, tried to pull a HSF with a wink/nudge to let me know how geeky she was. I think the horror was written across my face, because she hasn't said it again.
No. Those are not true Star Wars fans. Nor are the people who say dumple like "The prequels don't exist". I hate that. I really do. Even if I didn't enjoy the movies, that's sheer idiocy...even in jest. I saw a timeline guide for Star Wars: Rogue one, with a little flow chart that had the preguels labeled with 'we don't need to care about these now', and it grated my nerves for the rest of the day. XD
I don't like the last Harry Potter book. I guess I should pretend it doesn't exist? Now I'm not the authority of whether you're a fan or not, but next time someone says "But Han shot first. I wish he'd shot the prequels though, amirite?" I will beat them with my Ultrasaber while dressed in my Jedi robe. I don't care if I have to drive home, get it, and drive back, there will be a lightsabering before the day is done. >_> Basically, find some true fans...and youtube commenting is always a bad idea. It never ends with less than rage.
That said, I still disagree with you almost entirely.

Might be because I don't ever examine a movie from an 'artistic' point of view. Might be because I just don't think the same way. I like Rey, and I look forward to seeing who she is. I like Finn, because a reformed Stormtrooper is a cool idea. And I liked the shiny aspect of the universe. Most of the dichotomy, I firmly believe, is due to the technologically improvements in cinema in the last 30-40 years. It's easier to make a sleek ship now than it was back then, and overall, I think they did a pretty good job preserving the sort of grimy status. In the case of the rebellion ships, it's probably because they
are new, given that most of the old ones got blown up in the Endor incident.
I think the point of this movie was to pass the torch and start a new story arch; nothing more, nothing less. And knowing that they're making more sequels (which wasn't a surety in the time of the OG; that is, I think, precisely
why the movie is entirely self contained. Lucas didn't know if he was going to be able to make another. XD), I can live with the unsolved mysteries.
Plus, more Star Wars. That and that alone is a huge thing for me. The franchise isn't dead, the world is being expanded, and the story isn't over. <3