The problem with socialism is that in order to survive, they must force good/services/labor from those members of society who are most productive.

Socialism is by its own definition self-consuming... The productive members of society feel like they deserve more bread than unproductive members, so they stop working... In order to maintain control and reduce the starving of the population, punishment begins in order to extract value from the people to support the society.

Capitalism has its own problems, like insane incentive structures (marketing, advertising, data collection), as well as things like companies pumping money out of the government. A good capitalism prevents monopolies and duopolies, unfair business practices, and protects consumers.