I think we shouldn't make that large assumptions about 'horrible Soviet AI' or unrealistic Finnish front from sole sceenshot. The same goes for any country--German AI sometimes beats the USSR quite easily, while sometimes they miserably fail. You could easily get wrong impression about the Eastern front (which DH handles very well, much better than the original HoI2) if you had just one screenie of some extreme situation.
Besides, the Soviet weakness during the Winter War was more on the tactical than on the strategical level.
Besides, the Soviet weakness during the Winter War was more on the tactical than on the strategical level.