Soviets removed the “proletariat” from the dictatorship very quickly.

That's the western liberal line, certainly. The victory of the Leninists and Maoists transformed oppressed into oppressor by virtue of no longer having an aristocracy capable of oppressing them.

About the same time when Lenin decided he didn’t like losing elections

The elections failed to deliver the promised reform. Their biggest promise on taking office was to exit the war and withdraw the troops. And the first thing the Mensheviks did was double-down on defeat. Milyukov's refusal to exit the Eastern Front kicked off a protest half-a-million men large, right in the heart of the Russian government.

The next three months saw the elected government ordering police into the streets to slaughter hundreds of the people who voted for them. They topped it off by bombing the Bolshevik offices and chasing Lenin back underground for the unconscionable crime of leading peace marches. Bolshevism surged in popularity the following month, to the point that General Lavr Kornilov threatened to bring troops into the city to conduct a full pogrom. Only mass defection within the lower ranks of the military spared Petrograd from an outright holocaust.

This is the democracy you're defending? Christ. No wonder so many liberals seem perfectly content to see the modern wave of college students being disappeared by ICE.