'The Brits' was actually the RAF, RAAF and RNZAF, all part of the British Commonwealth and Empire, and the Dutch Netherlands East Indies. As well as most of the points above, the Buffaloes in Singapore etc were not combat ready, lacking fundamental parts and equipment. The other major factor was a degree of cultural arrogance which led to massively underestimating the Japanese, massively over-estimating their own capabilities, tactics, training and combat experience, and finally all that in a defensive role.
The Buffalo was not a great fighter, best described as barely adequate, but as John's just put the Finns knew how to get the absolute best out of it, and had a better version. In Malaya it was a lower performance version, with various equipment that made it heavier and slower, and less manoeuvrable. Guns that couldn't work or jammed, through mount and firing solenoid problems didn't help.
Additionally among 'the Brits' there was a great deal of friction, including an incompetent RAF Squadron Leader who was foisted onto an Australian unit with predictable performance issues, and the command structure was a disaster. There was no-early warning, and the Japanese were able to apply continual pressure and usually had the advantage of surprise, height, number, choosing the time and place of battle and the ability to keep up the pressure (had Pearl Harbour been under the same assault that allies in Malaya were, we would be asking hard questions of the reasons those defenders became overwhelmed. Never forget Napoleon's maxim of big battalions.) Any tactician will conclude that with
all that against them, the aircraft
type was almost irrelevant. For instance, had the defenders of Singapore and Malaya in 1941-2 been equipped with, say, Sea Furies or Bearcats, they would
still have had a torrid time - the actual type of aircraft was actually the least of their problems.
http://en.wikipedia.org/wiki/Brewster_F ... 8Malaya.29How much of the Buffalo users problems can be sheeted home to Brewster isn't normally given as a major issue, but it is worth noting that Brewster was that unusual thing in the era, a corrupt and massively incompetent US aircraft builder.
http://en.wikipedia.org/wiki/Brewster_A ... orporationRegards,