Really? You have special evidence? Better head to local news media and show them your special knowledge. As for Russians gloating, well US media make such big deal out of it and if it was $20 dollar gadget that give US mulit million dollar system problems, why not gloat?
Because it's not about technical or military superiority of the USA over the USSR or vise versa. It's about what is nowadays Russia - a member of the civilised world or the same old adversary, the Empire of Evil under a slim disguise.
For me, the answer is clear, especially when I observe the overwhelming popularity in Russia of lingo in which the most tender word for Americans is "pindosy" (a crossbreed between "amerikos" - in its own right a derogatory slang - and "pidor", i.e. pederast, the utterly outrageous insult in Russia).
As I can see, for you the usage of Russian equipment, for $20 or $ 20 million, against the American war effort isn't a reason for concern, but for gloating... yeah right, you're a Russian Conservative.
So can I ask you what are you craving to conserve? Soviet propagandist cliches of anti-Americanism maybe?