While the Buffalo is unlikely to make the list of worlds best it was nowhere near as bad as often portrayed.
In the Far East in 1942 operational difficulties (shortages of fuel, equipment, parts and so on) often degraded the ability of
all aircraft in the theater.
One also has to be very careful looking at statistics. for example of the 30 Buffaloes that 60 squadron came into possession of only 6 made it back to India. This sound terrible but a further look reveals only 8 aircraft shot down by the Japanese in combat. 3 were destroyed in their crates in a bombing attack. Even Mustangs could not help that

5 others were destroyed in bombing raids in dispersal pens, 2 were destroyed while awaiting test flights after assembly.
One was blown-up/burned when repair men attempted to weld a battle damaged fuel tank without properly purging the gas fumes inside. A few assorted crashes and engine failures account for most of the rest ( several destroyed to prevent capture when airfield evacuated.)
The squadron
claimed 27 Japanese aircraft destroyed during this period. Allowing for typical over-claiming it seems that in the air the British Buffaloes gave as good as they got.
Fighting to a 1 to 1 loss ratio while on the defensive is hardly guaranteeing a tragic outcome because of faults of the plane.
Edit: here is a website with a lot of information on the Buffalo. It's career in the Far East makes for interesting, if depressing reading. One wonders how well any other aircraft would have done in same circumstances. Granted a bit better in air to air but many of the losses were on the ground and a lot of the troubles were due to not enough mechanics and ground crew.