Sorry to see that you are disappointed with your purchase. It sounds like the tines are too high off the ground. If they are too high, the tines will not flip the thatch forward. They could even be too low, then dragging on the ground. Try adjusting the tray assembly by loosening the 4 bolts that hold the tray on the towbars (see page 6 in manual). Ideally, the bottom of the tines should be 1/2" from the ground, if you were measuring on a flat concrete surface. A quick 5 minute job. Ensure your handle is in the D dethatch position, and you'll be good to go.