“their rapid invasion and control of Ukraine”
The Russian Federation controls most of the pro-Russian areas.
The only majority pro-Russian area in Ukraine pre-2014 was Crimea - and that too, more a plurality (46&) than a majority.
There was no oblast that was majority pro-Russian, not even Donetsk or Luhansk
“The Russian Federation controls most of the pro-Russian areas.”
Was the price in blood worth that objective?