I think I remember Waffen having misaligned holes for the pins in the receiver, obviously causing pins to be out of spec. Sometimes visibly crooked/angled.
I could be wrong, it could have been a different manufacturer but it’s easy enough to check just get come calipers and make sure the pin holes are all where they’re supposed to be.
For what it’s worth, plenty of AK’s run flawlessly. I have one with around 6k rounds ran through it, many with a bump stock, all Russian garbage ammo. And I have cleaned it once, the day I bought it. Only problem it’s ever had I a couple light strikes, and a slam fire once....then I learned not to put it barrel down in the safe if it’s still hot.