Lost is the best show on television. And I was one of the people who thought it looked stupid and pointless and convoluted for two years. But I gave it a chance, and by the fourth episode of the first season, it was my favorite new show. It fluctuates in quality, as do all shows, but when it's hitting the mark, it's incredible. The mystery, the characters, the action, even the cinematography is top notch. I mean, yeah, you're being strung along, manipulated, purposely kept in the dark - that's obvious from the first episode, but that's okay, that's why you watch the show. When the entire point of a show is to elicit this feeling of "What the hell is going on here?!" then it's not in the writers' best interests to tell everyone so it changes to "Oh, that's what the hell is going on. Okay."
And as for running out of ideas... the head writers had a decent idea of what was going to happen before they started writing the show. That's not to say that they know everything in great detail, but they're not just making it up as they go along.
Oh, and I hated Alias, so it's not like I'm a blind fan of this kind of thing.
Just my two cents.
And as for the FOX News comparison, it's different in this case, because here, people are saying "From the hearsay, I've decided that I don't want to watch it," as opposed to "From the hearsay, I've decided that you shouldn't watch it." It's their own choice not to watch it, even if it something I think just about everyone should give a shot.