Is this 1v1, 2v2 or larger team games?
In team games, I'm starting to use RETs to set up a couple of Fighting Positions near key locations. It's not 100%, but it can help a lot in the early game if you can set them up in good places. Hiding in buildings (should any be available) is another method. Not sure what I'd do in 1v1s
But kubels vs US Forces are incredibly overwhelming, for sure.
Fighting positions are nice and all, but its quite easy to simply surround one, and if you spend MP on fighting positions, you're down a rifle or 2 and they can simply overpower you
I mainly mean 1v1. 2v2 and higher is even worse