Capitalism is not political system at all, it is economic system. What capitalists do however is bribe politicians in order to corrupt them, so that they defend capitalists interests.
Here is Naci Pelosi talking about capitalism, at least she admits America is capitalist (and the said that's just the way it is, there's a hint for you).
Then she slaps the label of "Shareholder Capitalism" which is one of those idiotic propaganda things that you ignorant Americans can't pick up, and end up using this idiotic label.
There is no such thing as Crony Capitalism or Shareholder Capitalism (she even got the timeline wrong, its not 20 years, its more like 50 years), there is just CAPITALISM
So just because some capitalists are humans with no empathy, pure greed and they would walk over the dead for profit, and others aren't does not change how the system itself works.
This is exactly the same as with Monarchy, system does not change depending on king being good person or not, whatsoever. But you are too stupid to understand this.