Conspiracies of Correlation
A propaganda theory of media confuses causation with correlation. Media operators and government leaders simply have the same national interest. For the media, it's all about the propagation of an American marketplace that consumes media and buys products that are advertised on said media. For the government, it's all about the propagation of American power.
Are the heads of American media sitting in the same room with the heads of American government, coordinating their press releases and campaigns? Or does the media simply have a symbiotic relationship with a powerful state? The distinction, which is perhaps subtle, means the difference between conspiracy and synchrony. To conspire is to assert agency among the conspirators. If the media is inadvertently pumping pro-statist propaganda because they're lazy or their incentives happen to line up with said propaganda, that's one thing. It's a whole other matter to assert that these institutions are collectively trying to harm us.
The pattern where cultural nostalgia is always 20 years ago may have more to do with the natural progression for people’s tastes
As teenagers, our tastes are aimless and focused on the present. In college, we move beyond the mainstream towards novel or obscure interests. After we exhaust those in our college and early-post-college years we look towards the youth before our youth. We seek new depth through the back catalog.