Is it me or the skateboard?

I've seen people skate pretty well with really worn skateboards and of course you'd have to try a little harder when riding a worn skateboard, but my skateboard's tail is really razory and really worn. I notice I can hardly do an ollie on it, and if I do it's like 1 foot high. Am I getting worse, or is it my skateboard's condition? You think I should get a new one?