I hear your sentient but disagree. Why do you think it is cancer?

First of all it got us to where we are today so it isn't all bad.

Second it is great at resource allocation and encourages innovation.

The problems of capitalism stem from corruption. You need a government to enforce rules to account for negative externalities. When organizations can bribe or infiltrate policy making you are no longer serving the people.

When the government is ineffective in it's time you see unbound capitalism which is cancerous.

I think your argument is likely "a shitty government in capitalst economy is cancerous"