Yep, welcome to network TV. If it doesn't get American Idol ratings, its cancelled. Quality, creativity, decency, don't matter. Only money. (See Jericho, Firefly, Arrested Development..)
I watch those that make it on network TV, but personally cable networks are FAR better at doing TV.
Cable = Quality
Network = Money
Sometimes network has great shows, like Once Upon a Time, Awake, Modern Family, Community - but most of the time, anything that requires above 100 IQ is written off network TV.
They want the idiots, with money.
(See Dick Roman Reference in Supernatural - although CW is a cable channel to me.)