Russia has already lost the war. They have zero chance of achieving their prewar objective and whatever they might eventually get in a hypothetical negotiation will not be worth the loss of men and equipment they endured, let alone the economic losses and loss of international prestige. Of course, arguably Ukraine is heading toward a loss as well, but there is still a real possibility to turn it into a victory with enough Western support. Of course that would require one certain political party to stop acting like traitors...