Earlier quoted context omitted.
It would be easier to fix your own government. General strike. They can arrest protesters, but they cannot arrest the entire working population.
"They" are also Russians. The key here would be convincing members of the police / army that they should work for the people, not Putin.
I wonder what it'll take. Given that currently the Russian economy is getting decimated, I wonder if it'll take a few weeks or months of not getting paid. But that might just make them more ruthless and make them start extorting people for money, since they still hold power.