You didn’t see Hank and Ben in your woods with their hatchet did you? It looks eerily similar to their doings
I agree that it wasn’t a porcupine (they eat all the way around on green bark) or a bear (too low), or a beaver (no teeth marks).
I’m guessing a buck did it, even though rubbing on rotting dead trees is something that I can honestly say I don’t recall seeing before. But I do remember watching a hunting video years ago which showed a 6″x6″ fence post whittled down to a 3″x3″ from years and years of deer rubbing on it (it was somewhere out west with few trees)