Sounds more like an l2p issue. I don’t mean that in a mean way, just that you have a hard time with/want advice on countering blobs.
OKW’s best bet is usually just out-dps-ing the usf blob. Obers backing up your volks and/or a p4 or luchs (if it’s still alive) would help a lot with that. If you can use it, the Stuka is a great blob counter as well. The mg34 works ok but you have to keep stuff in front of it because if he has like 3+ rifles with double BARs they might be able to frontally wipe it (same goes for other mgs vs infantry blobs, it’s not necessarily unique to mg34 vs rifleblobs). Generally, as long as you can hold your side and not get wiped by the blob you’ll be winning since you’ll be bleeding him very badly by killing a ton of riflemen models.
BARs are more or less fine and nerfing them would make riflemen straight up worse than volksgrenadiers whole also being significantly more expensive and having slightly worse support across the board. Double BAR rifles are designed to beat volks one on one and that’s why things like obers and luchs exist.
and all this shit for only dealing with rifles? Yeah...one player can spam rifles with so less mirco..the other player need a ton of different units to deal with it.
Sounds legit