Actually, I do think the inherent restrictions on people's activities makes communism an inherently authoritarian ideology, particularly when someone is attempting to implement it in place of a more natural economic system such as capitalism.
Lets get one thing straight. Both Adam Smith and Karl Marx had had serious assumptions wrong. The mistakes of Adam Smith were more than obvious by the time of Marx‘ works. Capitalism in its pure form does NOT have an invisible hand. The conditions of workers in England were so abysmal that life expectancy in London was down to 18 and in Manchester to 15 years. And do not get into the USA until 1914. Wealth means power something Smith never realised or put into his thinking.
Marx was wrong on several other accounts. There is no inevitability of revolution (in OTL at least some laws were inacted to better the lives of the working class) and his economic theory was stupid beyond reasoning (tried that).
So what chances did Russia have in 1918? Whatever economic system you have you need and have power to enforce it. But if you tie the power of the governing people to the economic system you can only end up with autocratic regimes.
And for those who argue that socialism is inherently not working please always remember history has also proven and is constantly proving pure capitalism is not either.