As others have mentioned, the Vapor line isn't the most durable. That said, I have plenty of Vapor 6's kicking around. The tops look almost NEW! Yet, they all wear out at the big toe for me. I get wearing just up from that at the tip of the shoe, but none of mine have any wear close to the wear on the OP's shoes.
I don't think I've ever seen anyone drag that part of the shoe on hard court (clay, sure while sliding). I think Nike could make this shoe a touch more durable but many of us like them b/c of the lightweight qualities. I'd change your technique on hard court...seems like it would be a good thing to do in preventing an ankle roll as well. But I don't think Nike would be responsible for something like this. Find a shoe that has good protection in the area you drag and you'll be good to go.
K90 (x4) 375gr. MSV Focus Hex blk. 1.18 53 lbs.
Jack Kramer Prostaff (x5) Prince Synth Gut 16 42lbs.