Okay, if you look at the casualty count, you'll see that Russia did indeed have a lot more dead then Germans in the battle. This is however, because there were a bunch of civilians killed, as well as 'patriotic' civilians, who just grabbed a couple of guns and started firing at the germans, with no training. And lack of supplies did kill them, because if supplies could be delivered, they would get warmer equipment. Lack of supplies + deadly cold = death. And the russians were responsible for the lack of supplies to the germans. The 'human battles' that you refer to are the ones fought by the people who were defending the city. Well unfortunately, they didn't have much choice. If they tried to run away, they would die, because the germans would outflank them. So that's not much of a choice there.