That is an incredibly low bar to judge any organization. There are multiple conflicts going around the world that UN has done nothing to do. When it comes to permanent members of the Security council, the UN is powerless. Heck, it is powerless if one of the permanent members decides to flex it's muscles somewhere else geographically either.
Also, no world war is also largely due to presence of nukes with nations. The concept of Mutually Assured Destruction prevents nations from going into full blown wars when 2 nuclear powers are involved.
Wait, blocking subtitles of all things? TV shows and films often get entangled in copyright issues, which sometimes make them regionally available only, but subtitles! That's preposterous.