it would be fairer if we have bias Soviets on the ground and usa planes biased in the air. Like the real world . Soviet have 5x more tank tahan usa . And usa have 2,5 more aircraft than the soviet union
while the United States is in a different position . During the cold war the United States maintained 2.5x as many aircraft as the Soviet Union. both in terms of quality and quantity. so they don't need AA. The M163 was the Vietnam war weapon and the last AA mass-produced by the United States. it's true that in war Thunder aa Soviet was better. but there's a reason. likewise in the air not United States aircraft are very BIAS. even now the United States has 10x more aircraft than Russia. so it's normal for the USA not to make AA
at the start of operation barbarossa the Soviets lost 5000 aircraft in 1 week. this made the soviet union have a down feeling even though they lost all the planes the enemy should not have air supremacy. this continued throughout the cold war and Russia. where in 1990 the majority of air defense systems were in the soviet union. This defense system was so strong that in the Ukraine war Russia gained air superiority. The S-125 Neva/Pechora from 1961 could shoot down the Lockheed F-117 Nighthawk stealth aircraft. using a radar that uses a vacuum tube