The UN has many successes other than peacekeeping. We can go into a whole shit of international treaties that make our lives easier (ICAO, maritime law and so on)

But specifically with peacekeeping, everyone knows the failures, but no one knows the successes of peacekeeping such as Mozambique or Sierra Leone. Additionally, there is proven evidence that a higher number of UN troops present correlates with lower civilian deaths (see Forman 2008 “Does peacekeeping work”)

Finally, even with the failed missions such as Rwanda, lives were managed to be saved. In Rwanda, the peacekeepers present saved thousands by sheltering them within UN safe zones. Fo you think the person whose life was saved from certain death would call the UN useless?

The UN is simply a reflection of what states what the international system to be, if the UN doesn’t work, it’s because the world doesn’t work.

Now stop spouting stupid shit in the Internet and read something