It made for a game that took years to balance because of it. The original automatch maps probably didn't help either. (Achelous, Lyons, Scheldt, Beaux lowlands with a destructible bridge, etc.)
you missed a part of the game possibly. If it went on long enough and you used your late game army properly then it was possible for US to "come back". Vet3 US Rifles made up for a lot of sins, and a well vetted US force was something a Wehr could fear. I think vet3 on armor should have had a survivability reward too, but other opinions may differ.
I may not have been clear enough but that was also a point I was trying to make. You had the advantage during these windows and it didn't mean that you would be able to crush your opponent, just that you had the edge. Like you stated, you could come back.