Lenin did not seize absolute power out of some lofty ideal of protecting the workers. He was very motivated about reclaiming the Russian Empire and murdering any workers or separatists that were in his way. Even contemporary communists like Rosa Luxembourg recognized that. Lenin and Stalin had over 20 years to dismantle the state before the Nazis became a threat. Not to mention, the original plan was to ally with the Nazis! The leaders never had any interest in helping workers.