I always thought that a lot of Lenin’s hatred was due to the tsarist government justly hanging his brother for conspiring to bomb tsarist officials. His name wasn’t Lenin; it was Ulyanov and typical of many of our privileged today, the Ulyanov family was the wealthiest in the city where he grew up. His hatred and mass murder paid off - Stalin wanted him out of the picture and he probably killed him by slow poisoning.
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.