And that means what? I can and do play the other factions as well. I'm fully aware of manpower bleed challenges you can have late game with OKW, or OST. I'm aware of the pop cap issues you can run into with OKW too. Soviet 120mm mortars are annoying to play against as well. But USF is about the only faction where I am consistently short on all resources, particularly fuel, when trying to play against an opponent of similar skill.
The only faction that's worse is UKF without a doubt. But that's a more recent phenomenon and nobody seems to have any problem denying it was deliberately nerfed into the ground.
It means I agree that USF is the hardest to play, and that as a result low-skill players like you will suffer exponentially more unless you improve your fundamentals, and will have a distorted sense of reality about the units' stats.
USF has way more micro tax, more bleed issues, and is generally less forgiving to play, so it exacerbates inadequacies in player skill. An MG42 requires far less input than a 50 cal. A-move grenadiers require far less input than Riflemen, who need to close the difference effectively to minimise bleed while at the same time avoid mg42. Shermans require active round-swapping and need to avoid 20ish range snares from Ost or OKW Pfusiliers.
The units aren't individually bad, but they require more skill to use, which is why the low-skill USF players always complain the game is super unfair. In actuality USF needs a base/faction redesign more than it needs buffs.
Ever since a-move 50 cals and god Howie were toned down, USF has lost all its low-input for high-reward units, while ambulance, pizza base, and backteching for AT gun remain as frustrating as ever. I know the pain, because 50 cals used to take care of themselves while pack howie murdered grens/mgs with autofire alone, giving me plenty of micro/attention to focus on my core infantry and Sherman/Jackson, or to manually unstuck the idiots trapped in the pizza-base.
Tldr: USF isn't *super* weak, it's just slightly weaker. But as a faction it is super difficult for low-skill players to play since most USF units require significant user input to utilise effectively.