I don't know about that, the Russians put the Shermans to very good use and weren't too displeased with it as far as I'm aware.

In fact, the Sherman would seem to work better in the East than in the West, with the larger area of operations allowing more breakthroughs. Like the T-34, the Sherman is more of a classical blitzkrieg tank than the larger and more heavily armoured counterparts at the time. I would even go so far as to say that both the T-34 and Sherman were very good tanks for the war the Soviets were fighting during the latter half of the war. That is, striking where the enemy is not concentrated and advance into the rear.

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"Nervous wait for the whistle to blow
Rush of blood and over we go..."
- Iron Maiden, "Paschendale"