The more you find out about the UN security council, the more you find out how ridiculously it's set up.
The 5 members with veto power are UK, USA, France, Russia, and China. UK & France rarely veto as they only want to secretly be cunts. The other 3 can't stop vetoing. Their interests aren't aligned and they don't necessarily care about people dying in order to protect those interests and that seems to always get in the way of their peace keeping.
5 countries who don't have the best history in international politics either so of course they want to be viewed as the judges of international politics. Best way to get away with everything.
It also says a lot about how bad guys are the only ones that can keep other bad guys in check in international politics. These countries being experienced war criminals is why they were able to beat Nazi & friends.