The same can be said of any major, you are trying to change the fundamental rules of the game for only 1 country.
The USSR lost 2.5 million men on the early stages of Barbarossa, but they had over 800 divisions as reserve, 60 of whom were equipped by Lend-Lease according to USA records, that is 9 million men mobilized at any one time, 5 - 6 million at the front.
USSR never had 800 division. Sure, they have TRAINED that many divisions, as ones already fighting got destroyed, but 500-550 was the max they had at any one time.
Besides, your assumptions about lack of equipment are pulled from thin air, the ones lacking equipment and cannibalizing their Panzer divisions to concentrate firepower were the Germans, the Soviets always had more to throw at them. At the start of Barbarossa there were 30 000 soviet tanks of all types including T-34 and KV-1 for which the Germans had no answer and only 3500 tanks in their own army, also of all types.
By 22 June 1941, SU produced a total of ~27000 tanks. That's including spin-offs from French Renault-17. Thing is, USSR didn't write off tanks as non-repairable back then, unless they blew up. So, out of a total inventory of ~23000 that were left by Barbarossa, roughly 40% required repairs, and were not combat ready.
SU is already gimped in the game, they don't have ministers that boost Infantry or the army or anything else other than Tanks after taking a focus, and have only specialist for most everything else, is it realistic that they have worse ministers than Sweden, Spain, Perú, Italy many minors, etc?
SU is buffed in the game, as any amount of industrial workers is conjured up from thin air, education of populace means nothing to their efficiency at any duties, and resources are magically delivered to factories, no matter how bad the infrastructure is in between them.
