I think you and I would both agree that Libya being on the council for human rights is a joke; however, we both realize that the country was democratically elected to be there by the 192 nation general assembly. I disagree with the election, though, as I think Libya has a pretty poor track record when it comes to such things. I think there are other nations with better records that would make fine councilmembers, and I think you'd agree with me there, too.
Where I think we disagree is on the conclusion. You think this illustrates that the UN is a cesspool, whereas I think it's just a stupid manuever despite it being done democratically. I think this stems from our differences in what we view the UN to be. For me, the UN is a place where countries that disagree can have a platform to discuss those differences between them, and like the link says, facilitate cooperation on international law, human rights, and world peace. Consider the good that organizations like UNICEF, and WHO have done for the citzens of the world, or at least attempted to in good faith. Hardly the mark of a 'cesspool' organization, given their goals.