That is frustrating. I have a SG, whose numbers are good enough he should be a decent shooter, but usually goes 1/15 in big games. Can't see what his problem is, except he has a 1 for Inside Shooting. Makes me think that must factor into outside shooting success, too.
Of course, the OD of the defender is a factor, too. But you'd think they would take fewer shots against a good defender rather than throw up a dozen bricks!