You speak in exaggerations and generalities. Nicholas II was a soft man, his government, filled with nobles, was the same. He wasn't a hardened dictator that would establish his own rule by any means necessary, he genuinely cared about the Russian people and earnestly believed that only by ruling as the Tsar could they be sheltered from hostile powers. Also, while communism did replace one dictator with another, you could never speak so generally as to make Tsar Nicholas II into Josef Stalin. The communist system was the same as the Tsarist? Please. The Russian Empire didn't kill millions of political opponents, nor did it cause starvation that killed millions more. Capitalism was alive in the Russian Empire, albeit underneath Tsarist controls (the reason it fell along with the Empire), in the USSR it was driven underground and barely evident.
I suggest you flip through Richard Pipes' The Russian Revolution. Maybe I'll come back sometime later and quote a few passages if this thread becomes worth anything.