But what would you have instead of the UN?
(please don't say some sort of organisation that only "nice" countries can join)
There's no reason that we have to have the UN at all, as it is simply far less important and much less efficacious than many on the left (and even center sadly) seem to blindly believe.
Or how about this: the UN as it is currently set up, but with the most embarrassing and plainly counterproductive parts removed. Like, it's very hard for me to believe that any serious-thinking, politically-interested person could see, e.g., UNHRC and UNHCR as anything but deeply embarrassing and pernicious bodies that heavily taint the entire institution.