Well, I have to assume he did not know how to set it up properly. And there isn't a whole lot to that, so I think you know what I'm saying about him...
After a few routine adjustments during the first flat of shells I loaded on mine five years ago, I've not touched it or the loader with a tool except to change bars or bushings (and I don't need tools for that, either!). I've replaced two fuses because I was stupid enough to cycle the machine with a finished shell under the resizing/decapping die. Mine's been about as trouble-free as a machine can be.
Ed