I've got the same problems here. My brother and friend (both available for gaming on a constant basis) have no interest whatsoever in learning how to play a fighting game. If I bother them enough they'll try a couple of rounds, but:
Friend will pick a character at random each round and mash like fucking crazy until something happens. Combos never exceed three hits, and accidental bursts are par for the course. He refuses to so much as glance at the movelist - if he can't do it by randomly shaking his thumbs, he won't bother.
Brother will play Ky, because he learned most of his moves back when we had Guilty Gear (y'know, the original). He'll do decently enough, but it takes a miracle to get him to play more than one match.
Now, Friend has suggested that with a local tournament on the horizon he'd be willing to actually "try" and learn BlazBlue. However, when pressed to try a few rounds so he can pick a main and actually get started, he complains that there's no need to rush, and that he'll start a month or so before the tournament, because "that's how long it takes to get good at these games."
I've given up, pretty much. Good thing there's online play.