I really don’t know what people expect of the UN. It’s far from perfect, but it’s still a means of getting countries to engage in some sort of dialogue and for countries to scrutinize each others actions. Granted, the original attempt (the League of Nations) failed to prevent WW2 but that was no reason not to try again. We might not gain much from the existence of the UN, but we stand to lose a heck of a lot without it.