Don’t think that you live in a white supremacist culture, especially in the Americas? Look around. Look at your government, from the low rungs all the way up to the top.
Are you using a European-derived form of government such as a republic or parliament? Congratulations, you’ve got white supremacy baked in. Is that government populated mostly or in large part by descendants of European colonists? Congratulations! You have white culture! What’s the most commonly practiced religion? Is it a form of Christianity? White Culture, Baby. Are the most common or official language(s) from Europe? Take a wild guess what that means.
Unless the Natives/First Nations/Aboriginal People are running your country under a governing system they traditionally used and you have assimilated into their language and religious practices… it’s pretty much a guarantee you are living in some flavour of white supremacist system. And nobody here is saying that you have to give all that up, just that you recognize how it works to privilege the culture of whiteness and suppress others. Listen to those voices and work for ways to suppress them less.
If you don’t want to do that, then admit that you are happy and comfortable living in a white supremacist culture. It doesn’t mean that you are a flag-carrying, torch-waving Nazi. It just means you’re okay with being indifferent to people less privileged than you, because you would rather not have to be uncomfortable, thinking about these things.