The article calls a lot of sound aircraft designs failures because they were employed improperly (wrong tactics) or the weapons they were designed to carry weren't ready by the time the war started. An example, the TBD-1 losses at Midway were the result of attacking Japanese battle ships without fighter escorts and by the outdated torpedoes that couldn't be dropped at high speed without breaking up when hitting the water. The Grumman TBF-1 Avenger was "successful" because by the time it entered service, more modern torpedoes were available and military planners knew that torpedo bombers needed fighter escort.
The parallel in Europe is in 1939, both the British and the Germans tried sending daylight bombers without fighter escort into battle. Every time, they suffered unacceptable losses. The point is in 1939 to 1940, aerial warfare was so new that most military planners did not know how to properly employ their air forces, or what the capabilities and limitations of their aircraft were. At the time, Bomber Generals saw fighter production as competition for resources, i.e. aircraft. The Bomber people at the time believed Stanley Baldwin's quote from 1932, "the bomber will always get through."