Who Was Responsible For The Romanov's Downfall

In July 1918, the royal Romanov line was suddenly and brutally ended by the Bolsheviks. The Romanov family had ruled the Russian Empire for over three centuries. The Romanovs reign was one of strict tyranny. Tsar Nicholas II of Russia made one big step toward a more equal Russia by freeing the serfs but because the serfs owned no land they had little to no money still. After WWI when nicholas led Russia to a crushing defeat there was lots of unrest throughout Russia. I think that the main reason the Tsar was forced to abdicate the throne and then was slaughtered is that he made a more equal Russia but in doing so he made the serfs more impoverished than ever, that he had led Russia into multiple wars that had ended badly and that the technology