Like it's an auto win for Soviets if they are facing double OKW or OKW + Ost without a howitzer counter.
I can agree that against double OKW they might struggle if both soviet players go arty but they still have counters in the majority of maps if they use the correct units. Against mixed team nearly 90% ost have commander with recon/dive bomb in which case arty is not a option. In that cases (or double OST) soviets are whatever but not OP or the strongest.
M5/T3 shittery I don't really think anything about Soviets is OP, strong, but not OP.
m5/t3 in 2vs2 is not as effective as in 1vs1. Opposite to 1vs1, by the time the quad hits the field, axis teams have lots of counters to it. I'm assuming, i do not play games>2vs2, in large game modes (3vs3, 4vs4) it stills the same or even worse?