Ukraine

Not to mention that Ukraine is moving away from traditional USSR military theory and Russia is not.

Russia pushes lines with body bags by making sure soldiers face gunfire from either direction. If you don't push the line, the squadron behind you will kill you instead. This becomes especially demoralizing, since the supply lines are also constantly attacked, leading to food & ammo shortages. Add to the fact that the Ukrainians are used to the brutality factor at this point and all of Russia's military tactics & strategies become ineffective - even the bombing of civilian infrastructure to spread terror is something Ukrainians have gotten used to - while Russiana complain about gas prices and Russian soldiers are literally starving.

Ukraine used to hold the lines with soldiers, told not to retreat, etc - but they don't have the luxury of utilizing gulags, prisoners, etc to foster the same meat grinder tactic - nor do they want to. So they changed their defense minister and set a goal of producing more drones than Russia can resupply the lines. Ukrainian soldiers therefore spend more time piloting ground drones than actually manning dugouts. The more ground drones there are than Russian soldiers, the more Russian lines are pushed back, the more rubles are being burned, the faster Russia's coffers are depleted.

This means that if the change in military tactics will increase the cranking of the meat grinder that Russians will eventually be pushed back. Not only that, but soldiers who have served and who usually return to the Russian labour force will not be returning, as there will at some point be two ground drones for every Russian soldier - and as Russia is speedrunning the path to an majority of seniors as their population, the economic outcome post-war will become even worse.

So we might be looking at one of the greatest economic collapses in modern history if all goes according to Ukrainian plans.