Hi Neffarion I'll tell you why u lost...
Luckily,I also played on the same map vs the same opponent, here is the things i will discuss:
-Should have went Medic HQ insted of Mech.
-Puma is a overkill vs a bren with flame, a at guns + shreck is enough.
-The UKF have the best unit in the game, when in green and yellow cover, you have to attack them with arty, LEIG seems to be very good against Tommies.
-Dint defend the right side fuel, u should have camped in the ammo and church, and slowly turning the game in your favor.
-After u destroyed the cromwell, the mid game was yours! u should have bought a stuka + at guns.
-I saw 0 mines planted from you...
-buying a p4, when u could've afforded a panther was a mistake that cost u the game.
In the end, everybody makes mistakes, the best is to learn from them and play better next time...
Here is my game:
http://www.coh2.org/replay/39701/rakatenwerfer-the-wunderwapaaan