Thank you for sharing, I'm also upset and sorry to hear about this experience. This certainly is not how we want our customer experience to be and is not typical, so I'm ensuring this gets to our field services department.
They don't remove the dish.
Then Drives off without a word and leaves the old dish and hardware all over my driveway.
The mess is definitely unacceptable, but they don't take away the dishes. In my case, they have left them neatly against a wall and I've had someone dispose of them. But your situation is of course different.
They definitely shouldn't have left the old dish and hardware all over your driveway. They should have put it in a pile on the side or even asked you where you'd prefer it to be left.
It is true that they don't take the old equipment with them though.