Well, propaganda releases don't sound as cool when it says "Our brave pilots took on 32 mediocre enemy fighters and downed 6 of them".
The problem was that opinions about the Zero went to the opposite extremes, from thinking all Japanese aircraft were rubbish and inferior copies of Western equipment, to being promoted as being invincible. No wonder people get their nut on about it; during the war, getting the story straight was part of the problem, let alone identifying what to do about the aircraft.