Interestingly, I just watched a series on Netflix entitled Hitler's Circle of Evil, a British production. It's got many of the historians on other similar series. Pretty good watch. This series pretty much focuses on the inner circle adjucants to the main dictator.
These men spent years embroiled in personal power plays and yes men games trying to assert influence over the years, often times to the detriment of "the cause". They worked together when things suited, and then quickly tried to crush other players when it didn't. Everyone paranoid at the time, and trying to get others before the knife turned on them.
I'd have to imagine the same thing is occuring in the Putin kingdom.