Yep, a lot of it is the people using them. No doubt our boys would have trouble if they were just handed a bunch of Russian hardware and told to fight a war too.
I remember 1982 in Lebanon. There were Soviet SAMs (I think S-200s) in the Bekka Valley there. When manned by Lebanese (or maybe Syrians, don’t remember), the Israelis (or Jews, as they’re called by the Azovs) would easily take them out. When manned by Russians, Israel would lose planes trying to take them out (eventually they did, but at a cost). It may have been as simple as the Russians holding off on activating their radar, or knowing the tricks that Israel used to get them the Arabs to give away their positions, but those same missiles were much more deadly in the hands of Russians.
Also nice to see we can spare 17,000 missiles. Have the Chinese agreed to sell us the components to re-build our supply, or is that still in work? Same for the Russians regarding the raw materials needed. (don’t you love just-in-time, saves money!)
For accuracy, the US has supplied 8,000 +, NATO the balance.
At increased capacity, we can turn out 4,000 per year. The Russkies can make 200 tanks per year. So at current rates, we’ll run out of Javelins before they run out of tanks.