what a big fat lie...and you even know it.
April 24th, 2014
-both ATGs got equal buff, in fact, PaK got greater one
December 19th, 2017
-Barrage nerf and cost decrease
September 2019
-Further barrage adjustments, decreasing OHK potential, increasing reliability to do any damage
April 10, 2020
-Decrease of effectiveness of barrage vs heavy cover
No other changes to its firepower and barrage.
You were never supposed to facetank whole barrage.
Go eat a bratwurst.
OK, lets play with your cards:
ZIS can keep at bay and Pen any tank, even at long range + the barrage + 6men. As an AT gun, is more than ok (inferior than its axis counterparts, but even good).
No one said its not ok.
Being worst at AT doesn't mean being bad at AT.
What's the point of naming faction traits again?
SU76 has more range and Pen than the StugG + barrage + almost same cost as stug.
StuG has double the armor, can actually deflect all stock medium tanks, got more health, got vet ability that is actually useful in combat and, contrary to SU-76, StuG is actual and functional and cost effective hardcounter to med tank spam, INCLUDING all premium meds.
ISU is a very long range Brummbar + can pen medium tanks and other TD.
Brummbar arrives much earlier, isn't limited to 1, got perfect accuracy vs ISUs largest scatter values in game, isn't doctrinal, allows you to have an elephant behind it, so you have exceptional AI and AT power on field at the same time WHILE also keeping ISU away.
T70 is a wiping machine since day 1 + scout + good at hunting halftracks.
Soviets early-mid game infantry play is non existent.
And I not even mention the T34/85 (its a OKW P4 on steroids).
Then better don't mention it and save yourself a flop, because its 3 years at least since it isn't unit used in meta.