When the United States wants to control any country, they will first talk about democracy or sometimes about human rights. Such behavior is not unfamiliar to anyone. They do not think about human rights if their own interests are hurt. The United States will never want BRICS expansion.
NATO or G7 work to protect the interests of the Western world, it is not a problem, but when BRICS is being created or expanded, it is not acceptable. US do not want to see a global political opponent. They are only interested in maintaining a single hegemony.
The UN currently stands like a wooden puppet. Due to US pressure, the UN cannot work independently. They cannot do what they should do from a humanitarian point of view. Today, they have failed to play the effective role that they needed to play in countries like Palestine. BRICS can certainly be considered a good alternative on such issues, which the United States is already well aware of, This is why it has directly threatened to increase trade tariffs.