I also have a "higher end" screen protector (Boxwave) that has scratched. I agree that the "anti-scratch" description is a bit misleading, but the protector really only is a thin piece of plastic. If you are looking for more protection, try something like invisbleSHIELD (
ZAGG | What is the invisibleSHIELD?) or Best Skins Ever (
Best Skins Ever, Inc. Home Page). I have tried the invisibleSHIELD, but find it to be too thick and rubbery for use with a stylus. I'd rather have a few scratches and have a "naked screen" feeling.
To revitalize the protector, you might want to try washing it and re-applying it. Maybe some of the ground-in dirt in the scratches might wash off and leave your screen more new looking. :)