It took me a while to learn that too much astern power, applied too soon, is the problem. It’s a mistake to try to dig the anchor in immediately by pulling hell-for-leather in reverse. The anchor needs to “soak.” It’s not a word you hear mentioned a lot, but once you know it and use it, soaking will improve your anchoring success.
As an aside, we used to pull our permanent moorings every fall. Now we let them soak over winter on winter sticks. Dragging is a thing of the past, something of concern in an exposed anchorage with a mountain on one side and a bridge on the other. A very unforgiving bridge, and that is another story for another time