Is There a Legitimate Groundwell of Anti-Pooting People in Russia?

There's always been dissidents and discontentment with the Putin administration going back to 1999. I'm sure anxiety about being a citizen of Russia has ratcheted it up since 2014, 2015. American media is absolutely obsessed with the idea of a palace coup in Russia because the war is going so badly. If he is to be toppled here are some of the alternatives we could be faced with according to Mikhail Khodorkovsky.