No they don’t want that. They want to topple the government and install a puppet regime, who can then begin to placate and pacify the populace. Resistance will be strong but more likely out in the countryside rather than in large modern cities like Kiev. Nobody wants another Beirut.
Good luck with that. The country is awash in weaponry from 8 years of war. Russian conscripts will not fight Putin’s war in Russia against determined locals. They’d rather be on their phones back home.