NATO has just 5% of air defences needed to protect eastern flank
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Soviet doctrine was that the Soviet Airforce couldn't go 3 rounds with the combined European/American airforces, so the Soviets invested a lot more in ground-based AA systems, having multiple overlapping systems for short/medium/long range. The purpose was to be able to advance their army under the cover of AA and deny NATO air superiority even though they themselves wouldn't have it.
Whereas, NATO doctrine was to just have air superiority and have aircraft shoot down aircraft & bomb ground-based AA with missiles and whatnot.
So yeah, NATO doesn't have much ground launched AA, but to project air defences they'd have their combined air forces, which is a ridiculous amount of firepower compared to everyone else. The USA has the first, second, third and I think fifth largest air forces, and the UK & France are up there in the rankings, then there's Germany, Italy, now Sweden.....