I totally suck at wrapping presents. However, I wrap all my wife's presents as kind of an ego boost. Show her that no matter how bad she thinks she is (she really isn't, but she's a perfectionist), someone out there is that much worse!
TMC - at least an attempt was made in the use of a bag. as long as you stuffed it full of tissue paper, it's all good. if she keeps it up, tell her you'll start paying to have someone wrap for you, and that means less for her