Lets get some basic points out of the way 1st.
USF is naturally bad on Halbe. The reasons behind this are:
- Long ranged map, USF backbone infantry are stronger at mid-close range.
- Very open with limited cover
Early game: Both you and your opponet played very heavily into the early infantry game. 4 rifles with BARs and 4 grens with G43s and then support weapons respectivly. Zero light vehicles to a large suprise especially on Halbe, which is arguably the most light vehicle advantageous map in the pool.
Floating: You had resources in the bank and didn't build at times specifically in the fuel department. By the time you could have fielded a stuart you hadn't even started teching captain. This lowered your stuart effectivness window as well as lowering the shock impact of the stuart when it did arrive. If you do happen to float like that and can build the stuart immediatly after the captain is teched use your captain to "supervise" the captain tier building for a 300% production boost to get that stuart out faster.
No ambulance/G43s: This is the biggest mistake you made the entire game. No healing means your infantry die significantly quicker which lowers the DPS output of your squads. This no healing was amplified by the massive strips of red cover and most importantly the G43s.
The G43 has a chance to crit models at or below 70% HP to instantly kill that model. EDIT: <- This information was proven false for all G43 upgrades and only applies to USF Pathfinders and OKW Jaeger Light Infantry. Credit: Old_Shatterhand With no healing his squads became significantly more effective than they already were. G43s are primarily used to advance on position since they can be fired on the move unlike LMG42s. This creates a naturally disadvantageous state for grens against BAR USF rifles because BARs are stronger the closer they are to the target more so than the G43s.
Doctrines: Airborne, Infantry, and Armor. All strong enough to be used but not considered powerful enough to be meta. Fortunatly his doctrine selection was not super meta either so it balanced out. However the difference between his doctrine and yours was he actually used his. I didn't see any sandbags built, m5 mines, or M1919s. M1919s would have been great on this long ranged map. I suggest using heavy calvary, tactical support, and armor for the full meta options as USF.
Map: Large arc MGs and long range squads are very powerful on Halbe. This natural advantage only aided your opponet. This could have been offset by a faster light vehicle.
Mortars: USF mortars are powerful but it is possible to utilize smoke to much. When you want to smoke an MG, it's best to only use 1 smoke barrage instead of both on the same MG. The optimal thing to do is smoke the MG and use the other mortar to barrage it.
Decrewed support teams: You had the opportunity just before the panther arrived to grab an Ostheer mortar and an MG42. The MG42 would have been invaluable to your composition as you didn't possess an HMG. Could've been used to lock down your fuel or fight mid etc. Also make sure if you don't want support teams to destroy them with AT guns or large caliber weapons. Your stuart would have worked but would've taken time.
Preemptive AT: You lacked any AT on a heavy light vehicle map. Your opponet didn't go for any 222s which is suprising but don't rely on your opponet mistakes or decisions to make your own mistakes. I'd say don't build the M1 57mm preemptivly only zook CPT and REs.
Control groups: I'm not sure if you use control groups but I saw a lot of blobbing and this resulted in mass suppression from MG42s. Try and space out more when moving to flank MGs. Control groups will aid you in micro even more and will allow for faster reaction times resulting in fewer losses and higher skill.
Late game: Could've teched for major and had a tank to deal with panther. Unsure why you surrendered if jacksons are an option. Never underestimate a jackson when micro'd heavily. The 10 range gap between the jackson and the panther is devastating when screened with infantry, especially when you have rifle nades. Don't underestitmate USF shermans. Not on par with the crushing power of the cromwell but those AP rounds have as good of pen as T34/85s. 40%-50% to pen forward armor of the panther and the HE are fantastic.
Overall: Your experience shows you're a very capable player, just need to focus on interactions between units should you know them and to not forget core concepts of every game. I.e healing, teching etc.
If you have any further questions, comments or concerns do not hesitate to ask.