Hot Take
I play as a soviet almost exclusively. I have not played a single game where the soviets lost.
When I shoot Americans, it's like I'm shooting rubber bullets, even at point blank. They all have massive kits and multiple guns with ruck sacks. They have extremely good kit options and better default armor.
I have come to believe they lose so many games because they have SO many more weapon and clothing/kit options that they spend an inordinate amount of time at armorys piecing together their kit than their soviet counterparts.
While they're piecing together their kits, soviets are out taking points.
Soviets don't have nearly as much to choose from so there is, more or less, more grab and go than on the US side.
That said, between the superior helicopters, and gear, if Americans could figure out how to step away from the armory faster they'd dominate.