I don't really think a moral analysis of capitalism is that useful from a scientific standpoint. It only has utility in propaganda for people who can't comprehend Marxian theory. But if we are going to carry out a moral analysis anyways, I think it's rather apparent that capitalism requires exploiting others to get rich, so naturally, people who are the richest are those who are the most sociopathic and the most willing to exploit others.

This means paying people little while you live in immense wealth off of their labor, but even more so, companies that can skirt as many regulations as possible and outright scam as many people as possible without getting in trouble will be the most successful and thus are encouraged to do so. We already see how Musk's companies pollute the environment and get away with it, or how he outright false advertises to get investments all the time and never gets in trouble for it.

Lying, cheating, stealing, exploiting, poisoning others, the system encourages it all. Even worse, since private companies are so tied up directly with the state these days, private corporations can benefit from massacring others with military force and conquering markets abroad in that way. The richest are those who are perfectly fine with carrying out a holocaust to make their portfolio go up a little.