> Capitalism allows individuals to take decisions in a free market.
Capitalism provides a set of incentives that shape how people make decisions. Anyone can be selfish, but selfishness in capitalist society has a particular shape. To ignore the external incentives when looking at human behavior is horribly naive and shortsighted, but is frequently done by capitalism-apologists who seek to disregard any criticism of their favorite incentive system.
If you want to complain about selfishness then do it on selfish individuals, which by the way, are present in all types of economic systems.