Trash players being unable to play USF has nothing to do with higher mechanical requirements imo. USF just requires a slightly different way of thinking about the game and that makes 90% of coh2's playerbase's heads explode. Any new player approaching the game with a rational mindset can still become top 200 (and probably higher) within 500 hours. That goes to show how terrible the established playerbase really is. Most people are incapable of analysing this game rationally because they have this irresistable desire to blame their own faults on the game or their opponent.
Every time I read your entries, I have the impression you're a Asperger person. This or having a serious superiority complex.
Most/all people blame on their faults on opponent or mechanisms because its human nature to do that. It takes a lot of self reasoning to pass through it.
Now specially for Coh2 the main reason for that is the amount of information someone must know to master each faction and be able to perform this rational analysis and the little available access to it. Some people may have it easier to master it than other, remain the fact that all Top players accumulate much more dedicated hours to the game than others. New almost-top players like Elpern or AngryDutch have spend tremendous amount of time on the game to reach their current level, something unreachable for 99% of player base.
So comparing their knowledge and capacity to reason on Coh2 mechanisms to regular player's one does not make sense at all and even more considering the latest as trash for that.
Now each faction requires a different way to play the game and players of all factions blame their own mistake on mechanisms or other players, not only USF one's. And USF is at the moment the less forgiving faction and the only one without late game dedicated units on their stock roster. No heavy tank, no rocket arty, no soaking damage behemoth.
Here there isn't a question of understanding the mechanism because everyone understand rapidly that in order to match Axis late game level you must pick Calliope or Priest every time on team game. Or doing the Path-Scott strat which is seen more and more regularly from 2vs2 to 4vs4 at all levels.
Let's remember that because Axis players considered that a Jackson having a chance to bounce at max range from a P4 was unbalanced, balance team nerfed the Jackson's armor.
Because Axis players considered that Calliope was too hard to dive, they nerfed its armor so it can't bounce anymore and its health so it dies in two shots.
And now we have Axis players considering that the already heavily nerfed Scott is too good with pathfinder to nerf both units.