The theory of evolution, like every scientific theory, is ethically neutral. Its truth or otherwise is one issue; what people do with it is a different matter altogether.
Just because people use nuclear physics to create weapons of mass destruction, that doesn’t falsify nuclear physics.
Just because people use the Internet to distribute pornography and misinformation, to spy on people and to sell advertising, that doesn’t mean that the Internet doesn’t exist.
Similarly, just because people use evolution to justify eugenics, voluntary human extinction, and lowering our standards of behaviour to that of the animals, that doesn’t mean that evolution doesn’t happen.