Yeah. American television is pretty unfortunate right now because the ratings are now hogged by a significant amount of reality TV shows. Thankfully the reality boom is over, but they've settled to a huge portion of the ratings market. That means less original programming survives on the air. There's also a proliferation of channels, but there's still only a finite number of viewers. The only "reality" TV I care for are sports events, and even these have to compete with the reality TV shows. They're so fucking cheap to produce, too, that TV networks heavily favor them as part of network product diversity. You get a hit reality TV show, you have this cash cow that costs almost nothing to produce and takes even less effort.
And just to be sure, I'm not blaming reality TV for the cancellation of TV shows, I'm just saying there's much less space for good shows to survive nowadays because of them.
Yeah, see: Heroes. Damn, really sad that one was cancelled. And yes, thank you "The Real World San Fco" or whatever the name was.
New Breaking Bad was AWESOME, new season is looking great!