Of course, it did not help that Hitler thought he could advance much faster and did not even prepare for winter. Those two winters weakened the Germans significantly.
[1] I've recently read a newish book about the casualties on the eastern front which suggests (based on research by western scholars) that the actual numbers were probably well over 32 million people and due to political reasons had been down played a lot by soviet sources.
https://en.wikipedia.org/wiki/World_War_II_casualties_of_the...
A Russian division-strength attacking force pushed a Finnish brigade-strength force back about 400 m on a fraction of the front which was about 800 m wide.
The "bad losses" were 49 men killed on the Finnish side. The Russian losses in this two-day battle were estimated about 1400 men killed. And as a result the Finnish commander remarked that "the Russians have changed; they are no longer throwing human life away completely mindlessly and they actually try some sensible military attack tactics".
A ratio of 30 Russians killed in attack to grind down 1 enemy was "sensible" compared to what the Russians had been doing before that. Of course, eventually it worked, they had the 31st soldier as well.