We are more and more nostalgic about everything. But I don't see how people can think TV shows were better in the 70s, 80s or even 90s. Since 2000 we live in the golden age of TV shows. We got The Wire, the Sopranos, Mad Men, the Shield, (Game of thrones?, Westworld?) and a ton of original concepts. I tend to think that nowadays there is more originality and risk taking in TV shows than in the movie industry.
This summer, I watch Twin Peaks The Return, some episodes are the weirdest things I have seen on a mainstream TV channel. I am amazed it was allowed to air at prime time.