We've been without cable TV or dish for about eight months now. The kids would veg-out too much in front of the set, and my wife and I rarely found much to watch. I am interested in a few shows here and there, but they're rarely on and the few times I've recorded them, I rarely have found time to watch the programming, anyhow. I'd record twenty things a month, and find time for a quarter of them, at best, or not care if they were unfinished...stuff to do and real people to see on my weekends. About the only thing I miss are my F1 races; after that, there's not much I'll care much about missing.
My theory is that so much of TV, whether it's news or entertainment or sports is usually based on dumbing things down to a level where a teenager could understand 95% of the episode, using excessive amounts of repeated body language and overplayed emphasis in lieu of verbal content. Maybe it's because the older I get, and the more my life changes, there's less of it that I can relate to on that TV set. I don't really care for manufactured adventure, drama, overly-scripted nonsense, or seeing what others can do when given a limitless budget; and the same goes for my real life. I think the so-called "unscripted" stuff is like experiencing bad office politics that don’t affect me or getting trapped in someone else's Facebook page of someone who has completely different interests.
I don't think the overall quality has really changed much, to be honest; I just think my tastes and experiences have changed greatly. There were bad and forgettable TV shows decades ago, there's just more channels now; there's more to pick on.