As someone who vaguely remembers the 90s I can tell you that there is no transformation in media, politics or culture. Well, there is.
But the difference people describe, that politics used to be based on sound science and now, with the internet/facebook/fake news/tiktok changed to be based on total bullshit. Not true.
Not because media and politics aren't currently almost exclusively bullshit. But because that wasn't any different in the 90s. Back then media was full of bullshit, and politics reacted 100 times to media bullshit for every time it reacted to actual science. Hell, there's positive evolution too, I think the BBC has actually improved their fact checking since back then, for example. And I actually know what is trustworthy. I didn't know in the 90s.