He didn’t recreate the Tsarist system, he tore it down and tried to make it into an anarchist state. Remember, he insisted on gutting literally ANY law and order at all, insisting on it even AFTER being forced to implement the NEP. Stalin you could argue tried to recreate the Tsarist system, but solely due to pragmatism on his part (Lenin’s unlimited abortion legalization and rampant promotion of homosexuality within Russia forced Stalin to put a restraint on it to prevent Russia itself from going extinct).
What Lenin desired, let alone implemented, was something MUCH worse than the Tsarist system.
And yet Communists kill off all undesireds and deviants once they are firmly in power. See Stalin and Mao, they purged the gays and anarchists.
The NKVD was merely a continuation of the Okhrana, the Czar’s secret police.