1M Russians dead? According to the US government it is currently 120k and Putin claims that is a gross overestimation, Ukraine has about 70k soldiers dead. However Russia has 2M troops and 250k paramilitary, there is a sufficient pool, Ukraine had 250k active troops before the war started and 1M reservists, however 768k military aged males left the country since according to the EU…
And Russia is not alone here, the Chinese are currently supporting Russia which can muster well over 100M men if they need to and have a massive economy.
Again, stop thinking simplistic about this problem, you cannot have Ukraine fight their way back and re-occupy Crimea, that’s the reality on the ground, so you need to ask, what will it take to end the war. Putin will not hand back Crimea and Georgia and Transnistria and Donbas, they are all ethnically Russian now, partially because weak FDR policy (who was a communist and Nazi supporter), but also Carter, Obama and Biden policy. If you force Russia out, how, where are the Russians that have lived there for a century going to move? If you follow history of the area from Genghis Khan to Napoleon to Hitler, it will end up with scorched earth but this time with nukes?