I have exactly the same problem… except that I’ve had my Ring Doorbell for only 3 days.
Yesterday, a package was delivered. The Ring Doorbell didn’t detect or record the delivery person. My wife walked up to the front door (where the Ring Doorbell is installed) to get the package. The recording of her starts after she’s walked away, and is about 10 feet from the front door and facing away.
My yard is fairly flat. I have a 12foot poarch, with one step down to a sidewalk that is level with the yard.
I shoveled the walk and poarch, but none of that was captured by the ring doorbell.
The street we live on is not very busy, but it seems the only thing captured are cars, in the street, that is 45feet away. Except… it didn’t capture the garbage truck… which is a very large vehicle, doesn’t move very fast, and makes two stops across the street, in view of the ring doorbell.
I followed the instructions taking into consideration the issues describe in the article you’ve referenced.
This doesn’t seem to be serving the purpose it was intended for.