>>64457029
>What issue(s) in particular? It's impossible that all the different classes of soviet equipment
Soviets killed off all their competent middle managers, first in the cities because competency is a threat, then in the rural peasant bosses because they were Kulaks and class enemies.
They also put all their scientists in Gulags, but then realized their mistake and rehabilitated their name, forcing them to make stuff.
Because of this they could still make good stuff, but production was still a clusterfuck (that's why, amongst other things, the systems of engineering bureaus became a thing). It is actually easier to engineer a good weapon system than it is to create a system that efficiently mass produced said good weapon. Of course the whole "communism" energy disincentives good things at every level.
You just need a handful of brilliant engineers and scientists to create a prototype. Being brilliant, they don't fuck up as much and generally smart people don't like fucking up even if they don't get anything out of it. Meanwhile, a mass production system requires thousands of hands, each of which is less-brilliant than the designers, and each new person in the system introduces another opportunity to fuck something crucial up.
Example: Soviets were importing western planes as parts kits between the end of WW1 and that start of WW2. They had issues successfully PUTTING THE MANUFACTURES PLANE TOGETHER, let alone doing that AND actually building the planes themselves first. Luckily (or unluckily) non-Russians like Antonov and Korolev saves the vatnik union's ass. They should have bailed like Sikorsky but I understand that wasn't always possible.