The buffalo was actually quite a good aircraft.
In what way? It was very badly designed with a fat fuselage, narrow wing (of too small area), weak undercarriage and feeble engine. It was overweight (in all its versions) and very difficult to handle. The relative success of the Finns is not a vindication of the plane, but a testament to the skill and determination of the pilots it was foisted onto.
To quote Bill Yenne "Brewster was pioneering a new field, it is just that they didn't do a very good job"
To put its crapness into a kind of perspective, the prototype was ordered more than a month after the first flight of the Spitfire and it flew as the Spitfires were entering series production, now go compare. The Brewster Buffalo was a shameful little beast.
I was just imagining the commander who might have had to send out Blackburn Botha's on a bombing run escorted by Buffaloes, eeeeuuuwww, not a happy thought! Thank god it never came to pass.