It's very sad.
When I was a child in the late 80s, and up until the late 90s. History Channel, The Learning Channel, A&E, and Discovery all showed quality programming.
I believe this changed when MTV capitalized on the success of reality television in "The Real World" and others.
Yeah, I hate it.  The problem is, it becomes way more profitable than running a standard show.  You don't have to pay actual actors.  You don't have to pay talented writers.  You don't have to think out and maintain continuity of a plot line over seasons.  Just find some tedious people and put them in a situation ripe for real or (usually) faked drama.  Then roll the cameras.  It's a form of banal voyeurism.
The only thing worse is the Marvelization of cinema.  Actual movies are a big risk nowadays.  They've gotten so expensive to make.  Studios are much less willing to take a risk on a Scorsese or Coppola doing any small edgy stuff like in the 70's.  Everything has to be a comicbook franchise with a pretty much established fan base and virtually pre-written script.  Heck, the movie is pretty much already storyboarded.  Just hand a hack director the comicbook and say, "Film this."
Also with at least half of a movie revenue coming from abroad nowadays, it is better to stick to simple, 2-dimensional plots and carboard cutout good guys and bad guys.  Complex movies with subtle dialog and or maybe culturally specific themes don't necessarily translate as easily into Mandarin.