Putin is a psychopath who doesn't care about anything. He gets money for the war anywhere he can. If 99% of the Russian economy gets destroyed, he'd redirect the remaining 1% to fully fund the war.
This is impossible, even in a dictatorship.
The starvation years of the DPRK in the mid 1990s directly after the collapse of the Soviet Union might be the closest that such a state has come to the situation getting so dire that the people could have theoretically risen up, no matter the consequences, but for a myriad of reasons the North Koreans were unable to.