Profile of ElSlayer

Youd also not position your medic HQ behind your AA gun as to not create that scenario.

Its a lot better than a plane crashing on your medic HQ by pure random.

Controllable flight where player can somehow affect crashing
or
uncontrollable flight with totally random crashing place?
A lot better?

You know, positioning medic HQ in your base sector also helps with it, but that is not an option.

I guess you're talking about 1v1 format. I have zero experience with it, but still here is my thoughts on topic in general.

OKW players usually go Mech HQ against soviets in 1v1, because maxim spam is too good against Medic HQ and Wuhrframen counters it.

Soviets without ZIS have zero AT capabilities that can reliably deal with puma or Flak Halftrack THAT early. All those advices like "just oorah+grenade it with cons from multiple angles" usually lead to heavy MP bleed or even squad loss (if they get clumped) without actually destroying vehicle which just move back Mech truck for repairs.

Mines are too passive and unreliable (can be set off by infantry).
PTRS (doctrinal) are too slow to actually perform a kill.

I guess without commander options and investing in ZIS the best solution would be rush T-34 (or even T-70, depends on map and urgency) or SU-85.
T-34(T-70) will help you to deal with Flak HT, Luchs and infantry and SU-85 will help with vehicles only, but including Puma (try to take it down with attack ground once it pops smoke).

Going T-4 for SU-85 also helps by opening access to BM-13 which is damn good against OKW forward bases, but you need to be careful with it. Best would be to prepare positions with mines to prevent panther from rushing for it.

About high pressure of OKW infantry...
If you have noticed that opponent tends to blob, try to lure him into demolition charge. If he is not blobbing - things get harder for you, but still wiping single volksschrek squad with demo gives you advantage in resources.

Best lure is 120mm mortar (people hates to get shelled), which is also amazing agaist forward bases, but on the other side is big MP investment and vulnerable to Wurfrahmen.

EDIT:

You know, I've kinda rethinked my position.
You need -50 + 50 + 120 + 125(100) = 245(220) fuel for first SU85(T-34) ONLY IF you don't tech molotov/AT nade
while opponent need -40 + 40 + 45 = 45 for that halftrack
or -40 + 40 + 80 + 50 = 130 for Luchs
You won't be able to get those 200 fuel with uncountered Flak HT or Luchs around.

You'd better build that ZIS in any case, which means T2 is a must.
You can go T1->T2 or T2->T4 against OKW and latter is better, despite wurfrahmen.

If you go T1->T2, your M3A1 will get countered by puma and schreks very soon, although with flamers they do huge damage to OKW, often wiping a squad or two.
Snipers are good for taking out sturmpios and obers, but are weak against mass 5-man cheap volks.
Investing in both snipers and Zis will take away a lot of capping power and mobility.

T2 have it all. T2 just too good. Zis is a must.

Again, I have no experience in 1v1, but I think build order (in general) should be like this:
cons
cons
T2
maxim
maxim
(healing)
maxim
AT nade
ZiS

Try Mortar HT incendiary barrage.

Replay would be helpful. And entertaining...

Often mg will not be able to suppress squad fully before it enters grenade range due to unreliable suppression rate,especially at long range quite bad.The grenade range bulletin makes it even easier.

It never happens if you use it with spotter.