Much of the problems with Russian launch capability was not design, but their inability to maintain a sufficient level of quality control to avoid repeated failures, most of which we never heard about.
Key words there, sir; "quality control."
A Russian civil engineer once told me that drainage (around buildings and somesuch) is a "decadent bourgeoisie capitalist concept;" I assume quality control is considered the same.
Of course, quality control even if utilized in the western sense, would be abysmally a failure under any socialist system, because socialism breeds corruption and a preference for "on paper" "results" than real results.
One of my first insights into socialist domestic life was when a father came home, proudly bearing an East German-made electric bread toaster. Old, broken, and it had cost him a fortune.
I was confused when I later noticed the toaster in the trash.
It was explained to me that the East German-made toaster had been purchased specifically for one part.....a part for a Lithuanian-made natural gas stove. (I have no idea what part that was.)
It took a while, but I finally grasped what was going on, by then having seen so many other examples of socialist manufacture. The part for the natural gas stove had probably been given, for money or some other thing, to the East German toast manufacturer (who had his own need for the part), and the natural gas stove manufacturer had, on paper, marked his product as "complete," after which it was sold to the hapless socialist consumer.
This was s-o-o-o-o-o-o prevalent, a common practice.
And thus my theory about Soviet nuclear arms possibly--possibly--being duds.
I'm not so sure this might not have happened, the Soviets launching their nuclear arsenal, most of them falling back on their bases, some of them dropping over Soviet territory or even over the innocent Congolese or Paraguayans, some of them exploding in mid-air, and one meant for Washington actually plopping onto the ground in New Orleans, turning out to be a dud.
Say it takes 1,000 parts to make a weapon, and its delivery, work properly. All 1,000 parts have to be there, and in good working order. If one single item is amiss, the whole thing doesn't work.
The Soviets were socialists, remember.
I could very well see where a corrupt factory manager could have "sold" one of those 1,000 parts, or even two or three different parts, but on paper mark the weapon, or the delivery system, as "complete."
It's just a pet theory of mine, based upon what I saw first-hand and up-close about how life is under socialism, and so I could be way wrong, but it is within the realm of possibility.
I would suggest that the fact that some sort of nuclear exchange did not happen during the cold war was much more likely the result of (as DAT suggests) the likelyhood that Soviet leadership carefully considered the downside, and made the decision that living in the Stone Age was not really an option. The Soviets may have been zealots, but they can never be accused of being stupid.......
Of course, and I defer to Tanker, who knows more about things than I do, with one minor exception here. I don't believe they considered any "downside" at all, because the socialists were so wrapped up in the privileges and perquisites of being one of the few elites under socialism, that they didn't consider anything at all, other than maintaining their own status.