Bro, I think you have been viewing some echo chambers online and now feel that Putin is unpopular with the Russians, which couldn't be any further from the truth. The fact is, many Russians believe in Putin and still believe that he is doing Russia a service by bringing back the glory days. Russians are enabling this war. The protests against Ukraine in cities like Paris, Berlin or Prague racked up more protesters than Russia's version of "anti-war" protests.
A BBC report yesterday reported that this girl living in Ukraine was complaining that her mother, who lives in Russia, was not believing anything about the reality of the war and Russia's aggression. In their mind, Russia is the liberator and it's "manifest destiny" for Russia to control Ukraine.
Today, there was some Russian 18 year old gymnastic kid who was competing in the world championships and wore the "Z" necklace to show support for his nation's invasion. The Russian football team's captain came out with a statement barely condemning the war and his biggest complaint was how Russia was being treated internationally. Russians aren't against Putin, maybe the young generations living in Moscow/SPB that browse on Reddit but that's not enough to make a regime change.
Russia lived through the late 90s and through the struggles of USSR, what makes you believe that these sanctions will somehow induce a revolution?