Lenin not so much but other revolutionaries did adopt ruthless authoritarian tactics, worst of all Stalin who Lenin had wanted kicked out of the party but then Lenin got sick and died and that was that. Communism is branded Leftist for its economic ideological framework which in practice became mostly a myth. Marx himself had been an idealist who believed in political freedom. Whatever the Russians who assumed power under his name believed they put in practice its reverse. The economic theory was Leftist because it featured spreading national wealth. As a working political ideology it became an abomination as recognized by Stalin's immediate successors.