Putin’s Black Sea fleet was a feint.
Not specific to him. The former Soviet, now Russian Black Sea fleet was just there to keep NATO honest; the Slava class cruisers would not really have been a terribly viable warship class anywhere else, for example. It was a fleet designed to do one thing - have a HUGE alpha strike capability to sink a NATO task force trying to thread their way in through the Bosphorus Strait, and then deal with the occasional intrepid scouting craft. The strait is less than half a mile wide at some points and it’s a fatal funnel for major surface combatants and transports.
The Black Sea Fleet, no matter who runs it, has never been considered to be a major aggressive force and because of the local geography it was always going to be a side show in any war. Any serious invasion was going to be via land anyway; so the Russians never really bulked up the force - nor was there ever a good reason to.
Yeah, just like those columns of stalled tanks disintegrating on their way to Kyiv!
Putin is playing 17-dimensional chess!
Regards,