lol.
There is simply no reason for the shrek to be so powerful when in general axis are fighting lighter armor. I have no problem beating them it is just annoying why relic need to make things easy for axis and not much micro or intelligence needed. For example the magic smoke they get that is a get out of jail free card compared to the shitty smoke the sherman get that can't be fired on top of your vehicle and has a delay which makes it useless most the time to try and save your tank.
It really does make it rewarding winning as allies in 4v4 although.
It depends on which Shrek your talking about. Giving Shreks to Pgrens unless you using Luftwaffe Supply, Close Air Support, or Oustruppen is always a bad idea because Pgrens are very easy to 1 shot and you need to stick them in the range of a tank to shoot the shreks. In that case a very large amount of micro is require to keep the Pgrens alive.
Volk shreks are easy to use by design since OKW doesn't have very plentiful and mobile AT (Volk shreks also cost a lot, with the income reduction accounted for they cost 112 munitions) because they lack of the fuel to get lots of Vehicles and the Rackten only has 50 range. If you opponent is spamming Volks you can do a couple of things:
1. Spam Harder; Volks have pathetic performance versus enemy infantry so get stuff like 1919 Rifles/Para's or Shocks which will tear them apart.
2. Crushing; this is a big thing because OKW lacks any kind of snare so he can't stop you from just crushing all his infantry without retreating. USF has the best vehicles for this but both the T34 variants can do it. Remember to make tight turns without stopping. And even if you don't crush them pushing Volks stops their shreks from firing meaning you can employ this tactic using non-heavy crush armor.
3. Artillery; Katyusha's and other artillery will annihilate Volks blobs, as well as blobs in general.
4. Kiting; Shreks have 35 range so you can kite them with basically any vehicle. This is best done with the USF AA HT since it also suppresses the infantry making them unable to move at top speed. With even better micro you can do with with duel MHC's and wipe squads like there's no tomorrow.
5. Overpower them; A good OKW player will volley fire his Shreks at 1 tank to kill it as fast as possible, a bad one will just let his shreks hit what ever. When facing a good player make sure to focus fire his Volk squads 1 at a time instead of shooting at different ones. Turn his tactics against him.
https://www.youtube.com/watch?v=d5ptvd6NQac
Or just employ none of those tactics and charge blindly into enemy lines with TD's meant to engage at range.