Ukraine is holding the current stalemate due to its willingness and tolerance for enormous human casualties but has a limited supply.
While Russia's main advantage point is pretty much the serious overproduction (equipment) advantage it has over Ukraine (the West).
(It has close to the same production capacity as the entire West combined but the West can't send 100% to Ukraine to save for their own militaries, while Russia can).
And as we see, Russian industrial production is still rising through 2023 as well in all parameters, and will continue to rise,
But Ukrainian advantage (the amount of human sacrifices they can throw) will slowly decline in the future, that's how Russia will break the stalemate.
Once Ukraine loses the majority of its fighting force, including the extremely old, young, and disabled, males, it's currently sending, because of its limited supply.
You can say the West will try to send more mercenaries, but who will want to go there with such a high death rate? Not a lot of fighters, even with a lot of money promised.
This can last 5-10 more years, but Russia should win completely in the end, even though it already won pretty much.
They took 20% highest quality territory from Ukraine, without much economic losses, not the other way around. Stopped them from going into NATO, etc.
Whereas, Ukraine was thrown back into the stone age, demographically, economically, and infrastructurally, etc, not Russia and Putin.
