^ Maybe not lack of knowledge regarding Ancient technology, it would have been nice if they had a few Ancient toys to fend off the Wraith, hence why they could have survived so long with the Wraith out there, and generally know about the Ancients and their history. But, they would have not known where the Ancient city ship was, that leaves room for our team finding it, making base there, and stepping into something we know nothing about in the Pegasus galaxy.
The wraith allow them all to survive until they wake up and cull them but I didn't get the impression that the Genii knew about the Ancients.
SG:A's premise definitely was not well thought through, assuming that their goal was to create a premise that could carry four or five seasons of good quality drama. The topic of this thread is, how to accomplish that, focusing on the Genii as the possible key?