In this case you have the ability to pinpoint the actual issues with units equal to that of a kitten as you're completely unable to determine what unit can, what should do, why it can't do it and how to fix it.
Massed T34 have no problems with tanks once they flank them except for KT, but they are completely unable to fight infantry. You can reduce scatter therefore making it more likely to wipe squads or increase machineguns accuracy to make it a steady damage to inf, which every single other tank in game have.
@Zyllen
KV-1 have 1s faster reload to make it actually better for the additional fuel cost.
It's not more or less likely to wipe squads than the PIV, and it costs 25 fuel less. As has been said before in the thread the T34's biggest issue is the fact the MG's on it aren't that great, and the lack of a proper reload time equivalent to other medium tanks.
Massed T34's are good against infantry due to the shear amount of firepower your putting out, but the issue is that anything in enough numbers is good. If the T34 had a proper reload speed and better MG's it would be a good all round tank, but it would need a increase in fuel cost.
Right now massed KV1's are far, far better. Good armor, better reload speed, more health, and only less armor. Not to mention you don't need to pay teching costs, which IMO is the biggest issue facing T3 viability, not the issues with the T34 itself.
EDIT: And why do you keep avoiding the fact that you don't seem to have knowledge of the current meta, like, at all?