Unfortunately for Russia, adapting to misery is not a strategy and they will simply be killed in their misery because Ukraine is adapting new tactics and increasing lethality and has the home turf and the motivation. Also, Russia has many internal problems which are ripping the Federation apart bit by bit the longer this war draws out as well as economic woes and isolation which are growing. The modern Russian is not the 19th Century Russian. They are less likely to be enticed into wanting to fight for a cause that is completely optional and fabricated because it has no moral nor existential basis.