(some score) from the East German judge

An imaginary and exaggeratedly low score for some event, action, statement, or attempt deemed to be a failure or inadequate in some way. It is a reference to judges from the former country of East Germany, who were often seen as giving unfairly low scores to competitors from other countries during international sporting events. I'd say that pitiful retort would only get you 2 out of 10 from the East German judges, my friend.