“one 48-hour missile raid”
If Russia could sustain a 48-hour missile barrage then they would have already done so.
Russia could have hit targets in the West, they have nukes, they have big conventional munitions like FAB 250, 500, 1000, 1500 (a lot of them) and the ability to deploy them, they have the ability right now to step up their offense...
This is a limited war for Russia, where as Ukraine is losing, it is the West which is escalating things in the hope of turning things around.
Ukraine is Russia’s neighbor and that won’t change. Ukraine is a former major trade partner and many of the people have relatives on either side. Russia does not share your view of bleeding Ukraine out to the last Ukrainian: https://www.facebook.com/RevolutionIreland/videos/senator-lindsey-graham-who-has-been-up-to-his-tits-in-ukraine-since-2016httpsrig/1218472818909921/