If Russia stops fighting, there will be no more war. If Ukraine stops fighting, there will be no more Ukraine.
Putin himself has repeatedly made clear that he denies Ukraine's right to exist and is determined to extinguish Ukrainian statehood.
Putin in 2021 posted a 5,000 world essay on why Ukrainian statehood was a historical mistake.
Stalin was unable to extinguish Germany in its entirety. A neutral rump Ukraine state would be fine with many western leaders and their citizens.
Those who insist on permanent war will be voted out, as long as EU countries will allow free and fair elections (which may become debatable within the next decade).