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The aircraft that were better than the Zero were not produced in the numbers to really make the difference or were not deployed properly...People are free to bring up various faults of the Zero but this is not relevant to the abilities of the best Japanese aircraft because the Japanese had planes that were superior to the Zero.
Probably something the Japanese should have thought of before leaping over the precipice.but the US outproduced Japan by a big margin during the war
I really do think though that the A6M was being built long after it was no-longer effective as a front-line fighter. That is where the switch comes in around the time of the Battle of the Coral Sea in that you have novice pilots flying machines which have fallen behind the start of the art. True you can make up for this kind of defect if you have a pilot who knows his plane and has studied his enemy well as a veteran pilot, but these were starting to thin out around the Battle of the Coral Sea...