That's the type of balance threads which are perhaps meant to be rightful, but in the end fails badly because countless elements (e.g. type and cost of units, and their impact, and that Soviets have T1&T2 as one tier, various unlocks and strategies, commanders, and other countless things) were not included to provide a rather biased description of a something being OP/UP. Grass is always greener elsewhere, if you look at your field with sunglasses on. Just accept the asymmetrical design; if you don't like how OST's Tiers are, play a different faction.
The problem of OST T4 is not T4 itself, it is the Panther that is UP. That's all.
This topic should be in the strategy section, not balance.
If you struggle after 10 minutes to win a match against USF after them spending 680 munitions, them buying 4-6 rifles (4x280 = 1120MP), and after they built caches (at least 200MP) everywhere, then you may have a L2P issue.
We're still waiting on your replays to demonstrate your wild theorycrafting, or your playercard, where you are clearly top10 with Brits using what you call easy wins.