I am ninety percent sure that we do, in fact, have a winning record against losing teams. We have actually beaten all of those teams at least once, and swept more than half of them, but I feel pretty confident that if we'd had an eight-game winning streak involving wins over those teams, you'd be one of the first people in here to tell us how the streak didn't mean anything.
Also, I'm not really sure how you come to the conclusion that the Spurs' record against elite teams "sucks," when there are only two elite teams, and they don't have to play themselves, and they've only played the other team once?