What are you talking about?
Have you heard about the Epstein files? Was that a failure of multiculturalism?
Not only that, some people from western cultures are also preying on poor women in 3rd world countries with sex tourism.
Western cultures are supporting the rape of resources and corruption in poor countries around the world.
Capitalism, as practiced in western cultures, is in many ways a sad scam that leads to a lot misery for a lot of people.
These are just a few examples to show: all cultures have bad in them. No culture is good