No they don't, that's the problem. The writers get paid to make an entertaining show, not to pander to one section of fandom in particular. They have zero obligation to write something that you specifically, or any particular group of fans want to see.
Yes, they get paid to make an entertaining show. When they fail, the show gets moved to Tuesdays to die against the big hitters
This I think it the fundamental problem with these 'campaigns', the unjustified sense of entitlement that they bring. Just because the writers might make something that you don't like, that doesn't mean they've done something 'wrong'.
Yawn. Entitlement is a real buzzword these days for the pro-SGU camp. I have said this over and over, but for your benefit in case you really are here for the first time, I will say it again: I can't speak for everyone, but I personal don't feel any sense of "entitlement." Under normal circumstances, I would have given SGU a chance, not liked it, shrugged, and said: "Oh well, too bad, I don't like the new direction they took," then changed the channel. I only started hoping the show would fail after Joe Mallozzi's loooooooooooooongHaul rant, in which he insulted all the fans of SG-1 and SGA who through their support made him filthy rich. Now, TPTB don't have an obligation to write "to me" or to cater to my whims, but you bet your ass they have the obligation to conduct themselves in a professional manner and to refrain from insulting fans of their past or current work. In my opinion, TPTB are at fault not because of their choice to try something different, but because of their despicable behavior and conduct towards franchise fans. They made their bed (of shit) and now they have to lie in it.
As to the ranking pro-SGU reviews on IMDB as not helpful, that's hardly a "hate campaign", lol, but you are entitled to your interpretation of what those words mean. As someone who ranked many pro-SGU reviews as unhelpful, I truly felt that all the reviews I chose to rank unhelpful were, well, unhelpful. Reviews that bash people who write negative reviews, and that don't actually give any analysis of the show except for repeating the key buzzwords "dark, gritty, realistic" in the exact same manner as the ad copy for SGU, are not what I consider to be helpful reviews.