Lenin’s hatred of the Tsar seems to have mostly reflected his father’s resentment of Russia’s corrupt and aristocratic nature and its rigid class structure. These placed a definitive limit on the potential for him and the Ulanov family to rise in the world and in the Tsarist bureaucracy that he worked in. At its worst, the Tsarist system put the brighest people in service to stupid, theiving aristocrats with appointemnts or connections. Of course, Soviet Russia eventually recreated that system, as has Putin’s regime.
Lenin, in the guise of Communism, recreated the Tsarist system. Stalin ramped it up to a whole nother level.