They definitely played well, and no one can take that away from them.
Every team has their flaws and things they need to improve on.
The one thing I can identify from the US team was they thought they won, which lead to their sudden demise. In the last 5 minutes of the game they should have been working harder than ever to defend their win, not "trolling" with Portugal.
But in other points, they haven't had the experience of winning that many matches, so there is still a lot to learn.
On another topic, if Germany is facing USA next, It's going to be Germany's battle against their own previous coach.