SAAB just wasn't that good. The science was completely wrong, the set-up was unconvincing, and the plots were often clearly contrived to make the writers' points.
SAAB, like BSG, is a dramatic series about humans fighting a ruthless nonhuman enemy in space, but there are plenty of differences. Let me comment briefly on some of your comments:
1. "the science was completely wrong"
Use of the word
completely makes a strong statement. To say it is all wrong sounds more like bias IMO than honest evaluation. Do you have any examples in mind? How much televised scifi gets all of the science right anyway?
2. "the setup was unconvincing"
One of the things I liked about SAAB was the setup and the fight against the very mysterious Chig. Clearly this is no cheap scifi knockoff (like original BSG was back in the late 70's) and someone took the time to flesh out the details of the war with the Chig. I felt that their was authenticity to its depcition of the United States in space circa 2063. More importantly, my Dad - a veteran of the US Marines in WW2 - said so, too, and he knows a lot more than me (and presumably many on this board) about Marine warfare in a large scale conflict.
3. "the plots were often clearly contrived to make the writers' points."
When are they
not? BSG is an awesome show but there are times too that I have shook my head and realized the writers are making things happen to further the plot at the expense of authenticity. Not often, I grant you, but it happens.
For me, I am happy watching both SAAB and BSG and choosing between the two, would be like choosing between my son and daughter...