No, instead of putting them to death, they worked them to death. If they survived, they might get their freedom... and be watched by the KGB for the rest of their lives.
Also, to be fair, you have to look at specific time periods in Soviet and Russian history. Under some leaders, it was a very harsh prison sentence. Under other leaders, it was much worse.
Capitalism may not be prefect, but I don't like any of the proposed alternatives to capitalism:
Corporatism - I don't like power and money being centralized into corporations. They get wealthy and everyone else gets poor.
Communism (with centrally controlled economy) - I don't like power and money being centralized by party leaders and politicians. They have too much power, which results in abuses. Meanwhile, the elites at the top (unofficially) live rich lifestyles at the expense of the workers at the bottom.
Crony Capitalism (our current sociopolitical economic system) - I don't like the government and corporations colluding against the people. Works like corporatism except the government is helping them.
Laissez-faire Capitalism - Unregulated capitalism leads to abuse, so there needs to be some sort of regulations.
Anarchy - I don't like the strong ruling over the weak. It results in abuses and arrogance.
Dictator, King, Emperor, Single Party Rule, etc. - I don't like any system that gives a single person or group of people nearly unlimited power over everyone else. Any political minority gets stepped on. It also means that you may have a benevolent ruler now, but the next ruler may be malicious.
I'd rather see the break up of big business AND big government, and I would love to see more small private voluntary cooperatives and small businesses and small non-profits. Give the power back to the people, not to big business and big government. People should have choices.
I am not sure if there is a name for that.