It's just him venting. I say things like "move your stupid car already" when someone is going too slow. I would say it to a Porsche if they were annoying me. So I doubt he was criticizing your bike in anyway. It was probably just in his way or maybe he was just annoyed at something else, but I doubt he even really noticed what kind of bike it was, just that he didn't want it to be there. And I wouldn't say he was stupid, just impatient.