When the war is over the west will have another 45 million citizens meanwhile every other competitor will have falling or stagnant populations.

It doesn't really matter whether Russia wins or Ukraine wins. Slavic culture lost and western culture gained three decades worth more of population.

Meanwhile, China has its population decline, and Russia has its population stagnate unless it keeps replenishing it with Central Asians.

The west has a hold position perk while the rest of the world has a peak and fall system.

The biggest L of the day for Russia has been that it has lost to Ukraine on logistics. Incapable of keeping its supply lines free and safe even within its own territory.

While the territory that Ukraine has occupied in Russia isn't all that big in the first place, it comes as an embarrassment for the Russian establishment to be unable to kick out a small contingent of Ukrainians from Russian territories.

With undeniable confirmation that the Russian troop line is spread too thin, it becomes too easy for the Ukrainians to defeat them. All the Ukrainians have to do is to keep attacking at different parts of the Russian defense line wherever it is weakest at the moment, until Russian logistics breakdown from all the moving to and fro trying to contain different areas constantly.

In conclusion:

Ukraine is guaranteed to win the war at this point if they are already competent enough to hold Russian territory.