That would have been a peace deal that would have meant further hostilities down the line a few years later.
The main problem with the west is that they believe they can make a deal with Russia that they are going to honor. The truth is that Russia honors the deals when it suits them and breaks them the moment it's useful. Any negotiation is and will always be seen as weakness from the Russian side.
As their propagandist said "We are Russian. We want the world. All of it if possible."