Why won't he give up control?
Look at the current state of world geopolitics and how many vectors they're employing to bring Russia to heel.
He also came out of the intelligence community from a time which saw the USSR destroyed by the Bolshevik globalists. Carpet baggers came in to buy Russia on the cheap and their women were exported to be hookers.
And, if you know a little bit of Russian history, you know that they are a chaotic mess, until they unite behind a strong man. Then they're a force to reckoned with.
He'll probably serve for life if he can.