That is incorrect, first proper Soviet surface-to-air defense system was the S-75 Dvina which was first unveiled in 1957, beaten by approximately 3 years by the Nike Ajax which was first deployed in 1954. Admittedly the Ajax was ultimately a piece of crap compared to the Dvina but it was still the first.Soviet Russia IS the one who invented surface-to-air defences. They are the ones who perfected it and subsequently used it to tear the US a new one in Vietnam.
Yes, they are currently lagging behind in that field, but that's not because they lack the expertise to make good SAM systems. They're lacking in other stuff.
Would be nice if you shared the relevant study.