The Russians defeated the Germans with large numbers of mostly inferior weapons. Stalin said words to the effect that quantity has a quality all of its own.
Not quite. The German equipment was exceptionally well engineered,
BUT, they were not reliable and when they broke down, they broke down badly.
The Russian equipment was designed for damage.
Kind of like comparing a Maserati with a workhorse Honda Civic.
Right now, Russian and Chinese stuff break down a lot, so even quantity can’t help them. In contrast, American stuff is higher quality and more robust