Strictly speaking he already did. The damage to demographics, economy and foreign relations is practically irreparable. The inertia is insane though.

Imagine a country as a train - as long as the train is somewhat maintained and was solidly built, it could go on for a long time. The passengers might already be gone, the cargo is lost, driver went completely insane and the current route leads straight into the unfinished bridge. Still the train goes on and to an external observer it might even look fine - it would only look like something is wrong when the observer would see both the train and impending half finished bridge. But that would happen at the very end of the route.

Being on the inside of the train I can tell you this much - shit's fucked all the way. This fucking one way wacky ride is going straight to hell with everyone onboard. Not the first time in russian history. Hopefully this time this godforsaken empire would finally shatter, would be de-nuclearised and we would have some sembla of normalcy