What were the disadvantages of the Bolsheviks Civil War and why did they win the Civil War?

The disadvantage of the Bolshevik revolution was that it brought about a psychotically repressive and dictatorial government which was, under Joseph Stalin, among the very worst in all of human history. The reason why the Bolsheviks won was that the revolution took place in 1917 when Russia was still involved in WW I, and the Russian public was desperate to end Russia's involvement in that horribly destructive war, and was willing to do anything to accomplish that objective, and the Bolsheviks presented themselves as the means to do it.