Why do people blame capitalism for everything?

Just for context I am a medical doctor and have never taken an economics course. I just want to understand this better. From my limited understanding capitalism is an economic system where private individuals or corporations own the means of production. Where one of the key pillars is private ownership. How is this at all related to for example our mental health issues? I understand some people are greedy but I have understood this to be a separate issue from capitalism because no matter the economic system there is always gonna be greedy people. There seems to be a pattern of capitalism being blamed for everything, but I’m open to the fact that I could be missing something.