"Putin has failed. ... the West must prepare for the Kremlin's collapse." https://www.youtube.com/watch?v=R0H9bRPeUck [www youtube com]

I think this is wishful thinking. I think Mr Putin's position is relatively secure. Short of a complete battlefield rout that puts Russia under the control of an occupier (fat chance of that!), Russian institutions, the Russian people, and even the Russian oligarchs will stand with Putin.

A few months from now, when the total Russian war deaths reach 1 000 000, people will still be saying the same. They often compare this to what happened when the Soviets had something like 50 000 casualties during their invasion of Afghanistan, but the invasion of Ukraine is already around fifteen times that many without any significant threat to his continued rule.