In WW1 Russia had between 1.7-2.25million military deaths from all causes. That obviously has created the Russian Revolution. That was with a fast growing population, which was about as Russias today, but obviously with much more land controlled from St Petersburg.
This is really going to hurt Russia long term. As in Russia will no longer be the most populous country in Europe badly.
I wonder what loss ratios are like. Ukraine apparently has brought in a top brigade with new Western tanks, so I imagine they’re favourable, though on the other hand, Russia seems to be throwing its so far unexhausted numerical advantage at Avdiivka, whereas Ukraine’s resources are more limited.