Yeah.

And so, the 6th issue is Soviet useless planes.

Although even if we talk about WW2 Soviet planes, nothing in particular comes to mind.

MiG-21 Fishbed,

or Su-27 Flanker.

Sturmovik, maybe...

I think Cold War-era aircraft are the most famous after all...

Ilyushin Design Bureau

Polikarpov Design Bureau

Yakovlev Design Bureau

Iosif

Nikolai Polikarpov

Sergei Korolev

Andrei Tupolev

Nasty...