Moreover, Russia no longer dominates the Black Sea.
Russia will not be able to hold the south of Ukraine for long.
Lets get two things clear here.
My analysis about the "dominance in the Black Sea" was based on the current situation (ie. those regions are already under Russian control) not what may or may not change in the future. If that situation changes, obviously the dominance I talked about become void.
Also the "dominance I was talking about is for
after the war ends not during it.
Otherwise these "big" navies like Russian, US and even Chinese are too slow and I dare say too outdated technologically to survive modern warfare. Basically Russian Navy is facing the exact same threat in Black Sea that US Navy has been facing in Red Sea for the past 6 months, and both are failing miserably.
The remnants of its Black Sea Fleet are hiding away from Ukraine's maritime surface drones and its Neptune anti-ship missiles.
The biggest threat and the only reason why Russian Navy is "hiding" is the UAVs and USVs, otherwise I seriously doubt that a subsonic cruise missile like Neptune that can easily be countered is categorized as a "serious" threat even if the stories of its successful hits aren't fabricated.