Premade rank 470ish is low level?
Partially. It isnt high level either.
You did admit, that your team is a one trick pony and that your strat doesnt work, if the other side pressures you with infantry, while you dont properly invest in anti infantry, just to get a comet.
Adapting is the only option.
Besides: If the enemy manages to get 2-3 fallies, they lack in other areas. They are a huge mp investment and carry a huge upkeep.
My question is: What kind of stuff do you build for your mp, while the okw guy is investing in infantry?