It is unfair to straight up compare Volksgrenadiers to Conscripts or Grenadiers.
OKW has been designed with worse support weapons, so Volksgrenadiers are meant to be able to fight better independently than their counterparts. They are meant to be slightly more cost effective than other infantry.
Conscripts and especially Grenadiers however, are designed to be supplemented by support weapons.
That's how Riflemen should be, cheap and effective but instead they're expensive and lack luster. If they had something to support them early on they wouldn't be so but you've nothing. No MG, no vehicle, no sniper, no powerful CQB engieer unit, nothing.
I also like the point about vet bonuses. Rifles vet excruciating slow and when they get to Vet 1 all they get is an AT snare. It's pretty funny, its like "Oh I vetted up and all I got was something I should have had in the first place! Yippee!"
Several key USF units seem grossly overpriced actually. Besides Riflemen themselves a couple other units stand out as being way too costly:
- Definitely REs, 200 MP and 25 reinforcement cost for this unit? Seriously?
- 50. Cal, why it costs 280 MP and 7 pop while being locked behind a specific tech tree is utterly baffling to me. MG34 and MG42 both preform better, especially the MG42 yet they are only 6 pop and 260 MP.
- The Ambulance is incredibly expensive for 250 MP/10 fuel and I don't even see the point of having it available T0. It's a completely useless thing to be available as a starting unit.
I've made these comparisons before I'll make the again when you look at USF's starting roster vs OKW:
Rear Echeleons vs Strumpioneers: this is a very lopsiided comparison yet it's the reality. Strums can close in and defeat as many as 3 Rear Echeleon sqauds depending on the situation and easily can handle two at once. Strums might as well be Panzergrens.
Riflemen vs Volksgrenadiers - well we've been over this one. Whatever stat advantages Riflemen may have over Volks they're not significant enough to allow them to hold the line against OKW. Volks have the advantage here.
Mortar vs Schrek, neither unit is all that useful at the start.
Ambulance vs Kubelwagon - needs no further explaination
So you see, you need a lot of luck on your side at the start as USF because its an up hill battle.
It's not as bad vs OST because they have to build an infantry company building so they get a slow start and the USF mortar helps against garrisoned MGs.