Worst Printer Ever?

Bought this printer hoping to just set up and go, but its always something. Upgrade a bunch of things chasing every problem trying to make it better. Follow every guide on resetting everything to make sure things are square and true. Now during a longer print, the extruder gear starts flattening the filliment and fails the print. Just over it. I know this will be divided, and some will have no problems ever with it. Just not my experience