The only way Russia will stop is if Putin is dead. If he makes peace with no amazing gains, then he’s going to be killed. If Zelensky gives away land for peace, then he has bought some time, but Russia will be back for more. Russia will salami slice off a bit here and a bit there, never enough to provoke a full war. The war has to continue until one side is too exhausted to continue...or Putin dies.
Why would any Russian leader be MORE favorable to Ukraine and the West than Putin?