Honestly, that window of opportunity for Russians has closed, possibly for a very long time. By now, much of the gov is designed to quickly and brutally control opposition and protests.
For contrast: Just on the other side of the border a decade ago, tens of thousands of courageous Ukrainians seized a very similar opportunity. They fought and died for it, did not give up, and won the battle. Fuck Putin and his Yanukovych puppets, hello Zelenskyy and EU. But Ukrainians are still fighting to finish the war. They should be incredibly proud of their achievements so far.
If they had a proper air force, the war would be over. Russia has completely exposed and embarrassed themselves at every opportunity.