I don't think you need to be 100% anti-capitalist to see the harm. It's a bit of a false dichotomy. A purely liberal capitalist market is bad, so is communism, so what? A market is a highly dynamic non-linear system that nobody fully grasps. We are thousands and thousands of years from having a fair world. We need to keep trying to make it better, by talking about it, exploring it, trying to come up with ways to fix it.