"You" doesn't equal "most people". Sorry bud. Ask the balance team what criteria they use for balancing and they'll tell you 1v1, and good balance for 1v1 will carry over to balance for teamgames generally. Note: even though it doesn't look like it from my playercard, I play a lot of teamgames too but only with friends.
Also if they balanced to teamgames they'd have to buff USF and nerf both axis factions lol.
These usf nerfs effect team games more than 1v1, so they kinda broke the balance for 1v1 rule. Pak howitzers and mortar halftracks are seen more in teamgames. The closest nerf to effect usf in 1v1 came from the triple Pershing nerf.
You probably have devm to thank for the riflemen buffs. They almost killed usf.