In regards to the Devastator, it can be easily argued that it was a lousy aircraft given it's performance at Midway. For it's time however, it was a good aircraft, but like so many other aircraft of it's day, it became obsolete too fast when WW II broke out. Another point is that the Japanese fighters were brought down to sea level to attack the Devastators, which allowed the SBD Dauntless dive bombers to attack and sink the Japanese carriers virtually unmolested by fighters.