The definitions of capitalism to which you are replying are from Merriam-Webster.

If the means of production are owned by government, rather than by individuals, then individuals can have no rights. The right to own/control a means of producing value is the most basic right, and without it no others can exist. A person's ownership of his own volition is his most basic means of producing any valuable change, so from the very beginning human rights are founded on the capitalist principle of ownership by individuals.

Using examples of oppression under socialist governments is not an effective argument against capitalism.