Right now I am loosing against players I shouldn't be loosing to. I can CLEARLY see they got even worse micro than me, they have no idea how to use their units effectively, they have no idea about BO and their capping order is one of the weirdest I have ever seen. They don't use covers, take fights in the middle of the road being in negative one, no even slightest hint of flanking. Nothing. To be honest all they do is blob. All day long and they win. They win every freaking time.
I only play 1v1, and I'm not a stellar player but I agree that the US matchup for OKW is a tough one.
I played against two elite rifle commanders back to back yesterday. First time I tried going with the medic truck and got scraped off the pavement. The next time I tried using the repair truck and getting a Flak HT and managed to get a win.
This doesn't work for everyone, but I personally find that the Flak HT is a better mid game crowd control unit than the Inf Support Gun. ISG is just too erratic to be really reliable against serious US blobbing with BARs IMO.
Basically I start with sending my Pios to cap in the direction of my fuel. I build Volks and have them build one sandbag wall while capping to meet them closeby (usually at a Muni point near the fuel). A Kubel wagon comes out next and I park it nearby but out of sight of my infantry. If I see the riflemen engaging my soldiers I use both infantry squads to get into green cover or a house and hold them while the Kubel moves up to suppress. The minute they start focusing the kubel BACK THAT SHIT UP and get him away. Get him behind lines and tell him to stop moving so he 'unpacks' into suppression mode. If the rifles follow they'll get cut up by the infantry, if not they'll be forced to retreat.
The big danger is if the kubel gets flanked in which case, run it away as fast as you possibly can and pray it doesn't explode. While this is happening, have a second volks being built and either join the fray if he's being stubborn, or have them cap other parts of the map quietly while they re-inforce.
I'll build the repair truck somewhere close to base/in the base and then work on getting a Flak Truck out. The US usually just keep making infantry (soon to come with BARs) or will go for an AAHT. Keep the Flak Truck hidden and keep it far away from the front lines, try to keep it ready to fire because it's so flimsy if a Vehicle Crew sneezes in it's direction while it's packing/unpacking it'll burst into flames. Try to draw the riflemen into it's range with infantry so they get pinned and cut to pieces. Don't keep it in the same place for long. USE SMOKE to get away whenever you feel threatened.
Build some Racketenwerfers to protect the Flak truck and important areas, put them in buildings where possible. hopefully you can get some hits on the AAHT and just generally keep a lid on their armor aspirations.
I'll usually try to get an Flak Truck out then and get some Obers, maybe go for a Panther or Command Panther. Get a Luch if you must, but be aware that heavier stuff is coming so be ready to retreat it to Puppchen alley if you need to.
At this point your armor is all flimsy so Bazookas in blobs will be scary as hell, not to mention your infantry, even obers can be overwhelmed if they have LMG Blobs roaming the countryside, so try to use Flak as often as you can to bleed them dry.