It was a case of too small of a company trying to fill too big of an order.
Unfortuantely, Brewster never saw fit to re-do their facilities, and this increased tension between them and the US government, until finally, the government just went with other makers.
I believe VikingBerserker is correct on identifiying the "Battler".
FWIW, the F2A-1 that was used by the Finns actually had pretty good performance and a hard punch.
Someone around here once quoted that one could turn through 180 degrees @ 2000 metres in something like 7 seconds, which was quicker than just about anything else in the ETO, and the climb rate (at around 3050 fpm), was also very good.
Elvis