It's fine to criticize billionaires but people shouldn't make the common mistake of thinking the world would get much better if billionaires ceased existing. That tells me their understanding of how the world works is overly simplistic in the wrong ways leading to a distorted understanding and flawed predictions.
I think we could wish for better billionaires don't you? Some are ok, some are extremely not ok and have made the torment nexus we live in right now.
I agree, but there are alternatives that are even worse, like agrarian communism under Pol Pot. I'm not saying there's no scope for improvement with billionaires and their role in society, I just dispute that billionaires are some unique and unitary source of problems. For example, if a tax law was passed that caused an exodus of billionaires (capital flight), I do not believe that the median living standards would rise. I do not believe things would get much better. So this is not so much a disagreement in values but more about the facts of the matter.