I also thought Ex Machina was fantastic, so I'll give you some credence. Out of those I've only seen Steins;Gate, which I was not at all a fan of. Though I will give you that it was at least adult and not typical garbage anime.
I'll check out some of your other recs (some of which the last few posters have posted intriguing images of). In fact several of the last few posters have presented some that look potentially interesting to me. And that's great. I'm looking forward to investigating them. They're certainly not the norm though, and that's evident by the fact that most are like 20-30+ years old.
Television in general has a lot of fantastic shows that are not garbage. By comparison, anime probably has around a couple dozen. The same few things are recommended time and again. You can see it in this thread. Even my recommendations, I believe most were recommended by others as well. Anime films (not based on tv series) tend to fare a bit better than series and err on the side of good, but you still have to wade through a lot of crap.
Now, Network TV is absolutely largely garbage, but most outside of the industry don't actually break it down like that. By specifying Network TV you are intentionally filtering out all the great stuff found at places like HBO, Showtime, STARZ, Cinemax, FX, AMC, USA, NETFLIX, Amazon, and more. The TV landscape has shifted and "Network TV" is no longer the only game in town, or the norm. The real difference is these cable and streaming outlets are allowing creators more freedom to tell the stories they want to and not forcing them into 20+ episode seasons where they have to churn out stuff on a weekly basis. This raises the quality of the shows and budget per episode. Plus attracts better talent both in front of and behind the camera.
All that said, there are still great shows that come out of network TV from time to time. And certainly plenty of examples from 10+ years ago before the real advent of all these other options.