Seriously? You think that a drone attack on the Russian flag flying over the Kremlin doesn't send a message? Where was that vaunted Russian air defense?
Of course it's always possible that this was a putin false flag op, which would indeed be desperation.
Your sympathy for the criminals could not be more plain; "once Russia is done destroying Ukraine". This, of course is and has always been putin's goal, one it seems you support.
Don't hold your breath.