I’d say that in my experience I can flip a coin as to the decency of NA players. I’m a NA player. Maybe I have high standards. I’ve also certainly ruined keys before. I know what you mean, for sure.
My questions are to try and figure out if you believe these reports are lies. Reports of, let’s take an example posted here, playing alongside SA players for 16 years and finding most perform poorly in combat, in this poster’s experience, again over the course of 16 years.