Ukraine has been upping their attacks lately. And hitting more important and strategic targets with more success day by day. Black Sea Fleet Headquarter was a very important and strategic target (inside Russia) which has been hit by Ukraine recently. Ukraine and its' Western allies are getting more daring each day. What is the path forward for Russia?
The Ukrainians could destroy the entire black sea fleet and they'd still lose the war.
The point isn't about Ukraine losing anymore. (Because Russian victory is inevitable.) It's more of when and how much more is Russia willing to sacrifice for that victory? (In my opinion, they've sacrificed too much already)