Much of what we design and build today are built according to centuries of accumulated understanding of things like economics, material sciences and ergonomics.
Your phone is a rectangle because rectangles work.
Your home looks the way it does because it is the design that yields the best result between material/economic and ergonomic requirements.
The same for your car and so on.
Being different is almost never ridiculed, if the design is better than whatever preceded it. If difference would always be ignored and ridiculed, everything would be stagnant. But things aren't. Quite the contrary. Things nowadays evolve incredibly fast.
I typed out at least a paragraph in a much more "intelligible manner" (no offense there) but I deleted it all because this was as simply put as one can put it. A lot of the younger generation are so far up their own ass it's scary. Nobody raised these kids. The internet raised these kids. Have you seen what the internet does to kids these days?
Everything you listed is all aesthetics or opinion oriented. I see modern "crap" as you define it, non essential to anything that matters at all. Your question is therefore moot.
If you use a broader definition of modern living, everyone should say they are not tired of medical or scientific advances.
Like with politics, I think most people lack the knowledge and experience of most things to have a wise broad general opinion on it.
For instance, most people really shouldn't say that modern music is bad unless they have listened to almost all the recent releases of almost all of the hundreds of genres of music.
Most people shouldn't have an opinion on if architecture if better now or from any other time period without a thorough understanding of how buildings are made, the construction material and the little practical improvements that modern buildings have over older ones.
I mean, even for every single genre/sub-genre existing in the past, there are musicians playing that very genre/sub-genre today, but new songs. So, if music today is "crap", then music has always been crap, since music of the past constitutes a part of modern music. Same with architecture, literature, sculpture and everything else.
People preaching about "good old times" willingly pick on the worst of the modern times, ignoring the best.
Copenhagen is a nice place, even when you guys are setting off rockets in the streets on new years eve.