Jeb Babbin wrote a great book about the UN back in 2004: "Inside the Asylum: Why the United Nations and Old Europe Are Worse Than You Think".
The UN is bad not much has changed. It is horrible. The UN has turned into a gallery of anti-US and anti-Israel rants.
The US, and other world democracies, should demand more.
The US has a lot of leverage. Without the US funding, the UN offices would be closed for lack of money to pay rent or utilities.
Frankly, I'm tired of the UN.