To break through Russia's echeloned defence, you have to throw at least one division into the breach and after a while replace it with another. Because it will be all destroyed in the first stages of the breakthrough, having advanced in just one or two lines. Further on it needs more and more! They can't do it. Firstly, they don't have that much force. Secondly, any attempt to concentrate large formations before attacking makes them an excellent target for artillery and air attacks.
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Yesterday some new documents were leaked online which appeared to show that the 32nd was remanded due to mass desertion/mutiny and refusal to follow orders:
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Brutal.