Watch this.

https://edition.cnn.com/videos/media/2022/03/13/russian-journalist-yevgenia-albats-rs-vpx.cnn

Also see

https://www.youtube.com/watch?v=iqY-ufUZsDc

This woman knows what she is talking about.

The most important thing is to split up the FSB into competing fiefdoms with each headed by someone who distrusts all the others.

Leaders will always be imperfect. Its the diffusion of power that is important.