I'm sure my opinion is too hopeful and optimistic to be the current majority opinion.
But, for what it's worth, the most basic objectives of the military operation are threefold: to arrive at an agreement with the government of Ukraine to cease hostilities with Donbas, provide fresh water to Crimea (with implicit recognition of the fait accompli), and to keep NATO out of Ukraine. Those basics are achieved now on the ground. Once formally agreed at the table, Russia can retreat 100% all its forces from the sovereign nation of Ukraine, with the Donbas remaining a part of Ukraine.