My point is that the Russian people have a capacity for self-sacrifice that shouldn't be underestimated, especially when their (perceived) sovereignty is threatened.
During WW2, for example, the Soviets lost a total of 20-27 million dead. Only China, a country almost three times as populous, came close at 15-20 million.
My theory is Russia can continue to produce long range weapons and drones in factories near the Urals or even beyond in Siberia, far out of reach of anything the Ukrainians can get their hands on, and just outproduce the Ukrainians as long as it takes.
They're certainly trying. Had you asked me before the full scale invasion, I would have answered differently. But Ukraine still stands, and it's looking more and more like a Finland-like situation. After all the repatrionization propaganda that doesn't look good for Putin. And the Russian economy absolutely suffers from this, we just don't know how much.
The Soviet Union lost 20m+ dead because they faced an existential threat from an enemy that intentionally massacred many millions of people who lived there (including people who weren't particularly enamoured with the idea of a Soviet Union or Stalin as leader)
The situation isn't quite that bad in either Russia or Ukraine which was also one of the constituent parts of the Soviet Union. But it's certainly closer in Ukraine, even if most Russians hold an irrational level of enthusiasm for the war
So did the UK, so what’s your point?