Short version: Sherman vs PGs
HE > PG with shrecks. The attrition will be in your favour. You don't have to worry about the PG rather than the pak supporting them.
SV: fighting Tiger/TA
If there is only 1 tank in play, you should be winning the mp battle with your tanks. Just be careful at the CPs and be ready to have AT in the form of
If LT: put mines. Getting a late M20 is worth it since mines win games.
If Cpt: get double ATG
If Airborne: save munition for P47
USF play is "weak" late game without proper micro. But against OH, it compensates greatly during early-midgame. You have enough AI wiping capabilities to make up for his LMG grens.
In the last game i played i had 2 vet 3 schrepgrens charge a 3 easy8s and a sherman with he all of them upgraded , i ended up loosing the sherman and i didnt get even one of his fucking units in retreat because of the ridiculous modifiers they get when vetted
Read what spam r33k wrote. Also, replay or didn't happen. Or something else may have happen.
Wall of text with different issues.
Theres still things to solve but everything is not as grim as you point it out.