OKW doesn't counter the entire Brit T0. It's the UKF T0 countering Volksgrenadiers with Sections, MG and UC. Not sure what you are on about thinking Volksgrenadiers counter UKF T0?
T?0 units include 2 units that need to be in cover to work effectively and 1 vehicle fighting a cheaper unit that can deny cover and snare vehicles....
Its not Brummbär vs shocks level of counter but its "if rng willeth ye be fucked" counter.
Your Tommie don't burst down a model giving them the best chance of fighting down volks? Get out of that cover and try and find some new cover or torch.
Vickers did as vickers does and DOES burst down a model but doesn't suppress? Pack up, run home because it ain't fighting anymore...
Uc ziged when you told it to zag because of wonky pathfinding? Crawl back home!