At the time, the soviet air force was coming out of the worst paranoid purge in all of stalinist history. About 75% of ALL the leadership and structure was "purged" (killed, sent to camps, "removed" etc...)
The pilots fighting the Finns were the worst of the worst, [Edit, don't get me wrong there may have been a couple competent folks trying to keep things going, but as an overall unit it was hopeless] by this time they had little to no training, and barely knew that "turning" was a good way to follow an enemy. This remained true to lesser and lesser degress through the war, and it wasn't until all the way up to late 44, 1945, that the Soviet training machine geared up and actually started producing pilots on par with Western nations.
Before that it was limited to a single good pilot trying to teach his squad mates very basic things. That's why the Soviet aces stood out so much, received so much accolades, because they were a step above, and were in essence the teachers for their green pilots.
At the time of Barbarossa, Soviet pilots had almost no training as well, often bombers flying straight and level in formation as they let themselves be shot down. The German pilots felt sick that they didn't even put up a fight. Left a sour taste, but they learned that Stalin's paranoia only allowed the lead plane in any formation to know what it was doing and where it was going, so they killed it first. The rest didn't know what to do and flew on level until they were all shot down.
The Soviet air force was VERY much a quantity over quality deal, and this is very much true at the beginning of the war. That's why the Finns had such a massive kill ratio against them, most didn't know how to turn, let alone turn fight.