Ukrainians are mostly killing foreign mercenaries, prison conscripts, and the elderly surplus population?

Yeah! That’s in “The Art of War,” right? You’re supposed to send your “elderly” and other random dregs you can dig up first to fight a critical war. And then, once you’ve depended on all those “surplus” people for several years, you move on to your trained troops, the actual military. Obviously. It’s just part of the Russian mastery of military strategy that meant they took over the country in three days slowly pushed forward and got the mission accomplished and went home in a few months fought a Pyrrhic victory over the space of a year and a half and then negotiated a partition and then started rebuilding and preparing for next random invasion of some neighbor country got stuck at the border for years, ruined their economy and any respect their military or kit might have had on the world stage, and are now scrounging around for any possible military-age males they can lay hands on to keep feeding into the grinder, hoping that if they keep it up long enough, it’ll work.

I have more to say about the rest of your ridiculous message, but I don’t think it’s really necessary.