The way this end could be a win for Ukraine, Russia, and also Turkey:
Russia keeps both cities in Eastern Ukraine as a buffer zone and they get to keep Crimea, Putin laudes this as a win and sanctions against Russia gets lifted.
Ukraine, despite giving up some territories atleast the war is over, investments will flood in to help rebuild and Zelinsky gets to play hero for years to come.
Turkey because of them facilitating the talks between the two countries which shows they do have some influence on the world stage.
The biggest losers after this war is Europe and the U.S., for Europe they're gonna end up buying gas from Russia anyway after the sanctions are lifted and Russia sells it to them at a reasonable price.
The U.S., especially the sleepy Joe, attempting to play tough guy by proclaiming that Putin must be removed, even Macron told him to cool it with the words, the Democrats and media beating the war drums against the evil Nazi Russian regime will be dumbfounded that the talks succeeded. Gas prices will still be high, food prices are increasing, inflation is increasing, coming into the mid-terms this year they could get slaughtered if the Repubs play their cards right.