The UN is just a bunch of big powers bullying and doing what they like to lesser countries. And those big powers don't even sign or ratify all decisions made by the UN, or selectively pick what they care for and ignore those that don't favor them. The US for example has refused to cooperate in a international war criminal court that asks to trial its own.

Or how about the fact that in the 60's, decades since the signing of those rights, blacks still have to fight against seggregation in schools, hotels, etc? And modern stuff like torture, drone killings, rampant police killings of innocents, death penalty (including for minors) and all that stuff against basic human rights?

Heck, when the declaration of UN was signed, most of the countries doing the signing were still colonies, and all of the major ones had colonies themselves. Hurray for hypocrisy -- and selective enforcing of them as an excuse and as a weapon against lesser countries.