You're watching what happens when a country's leader has lost the nation. It's that simple. We will see what happens next.
I think the idea of Putin having lost the nation is mostly Western propaganda. From what I can tell, this "coup" is already over.
According to Ritter, the FSB busted a couple of "terror cells" who were going to coordinate attacks in Moscow with the coup, and elsewhere that the Russians knew this was coming a couple days ago (as a result of the bust). Intent was to create chaos in Moscow, the perception of weak leadership, that would in turn lead toward the Moscovites welcoming Pigrozhin to come in and "restore order". Didn't really work out that way. Sure, there are some Russians who are against the Ukrainian situation, just as there were American Hippies protesting Vietnam, but in neither case was the discontent strong enough to topple a government.
If there were a coup, it would have to come from the inner circles of the Duma and the Kremlin. There's no way a clown like Pigrozhin would be allowed to just take over.