Culture in the United States is a disturbing heap of consumerist oppression. I have friends overseas, and when they ask, I say "we do not have culture here, we have stores."
I can't think of ~ anything ~ from mainstream culture anymore that doesn't have a price tag attached to it in some way, shape, or form. Nothing of intrinsic value is being preserved by the mainstream at this point for longer than a few months before it is poached by corporations looking to make a buck on a once-unique cultural facet of our society. All of this is amplified by the globalized echo chamber you're talking about: as soon as anything of real value comes along, marketers and applications wring it dry of all of its heart until the general population is bored of it and moves on.
More and more it seems like the only escape from this technocratic capitalist culture is to return to valuable or forgotten traditions -- creation without expectation of return, sharing of stories of heritage and history lost by our parents, etc.
But then I don't think this is a purely modern thing. I think it has developed over the last century. I read an article recently that put it somewhat succinctly ( though I can't remember the article off the top of my head ) -- that the baby boomers enjoyed a kind of "in-between" period, where they were able to enjoy both the community and traditions put in place by their parents and grandparents, but also the individualism and consumer comforts of the modern age.
Now, we struggle for that, though it's all but gone. We cannot have it both ways: it wasn't sustainable then, and so now we're dealing with the fruits of the usury of our culture. To return, I think we'll need to ditch some of our modern ideals around value and build up the long-lost communities of the start of the last century and beyond.
I think you're only nostalgic if you're pining for something that can never return, or that doesn't have true value. I don't think that's true of the community-centric culture of our past, and I think everything of value -- real value -- follows from that kind of culture.
There's a fine line, though. I have trouble breaking out of the consumer mindset -- that culture can be bought and sold readily, and that culture boils down to a dollar -- because it's what I was raised to know. It's what I was brought up in, and trained for. Then, it's a paradigm shift -- and a hard one -- to consider any other path.
Art will come with a real culture, a culture that isn't self-centered. And invention, and innovation, and stories, and real value -- value that you can feel in yourself, not in the next object you're looking at.
'Phew. Big rant, sorry.
Anyway,
You're not alone.