Not after investing billions of dollars into that piece of land, building schools, roads, and hospitals.
The most advanced native African government to rule South Africa was the Zulu Empire. Sure it was superior to its tribal enemies, but it was no match for Europeans.
Europeans built that country. They're the ones that brought farming, industry, order over tribalism, education, and the service industry. Without Europeans South Africa would be ruled by the Zulu Empire and less advanced tribal people.
It's not their country!! White Europeans built South Africa from nothing, and then handed over its framework to the Black Majority.