What goes on in Sudan, or Algeria or India doesn't attract lots of media attention either, because the press is not welcome and because these are matters inside countries borders.
The UN's purpose is to avoid conflicts between nations.
If Zimbabwe and China got a human rights commission and not the US, doesn't it have to do with giving this role to different countries from each continent?
Besides, one wonders why , inspite of the fact that the US is the sole surviving great power , its influence in the UN has diminished so much. Doesn' it precisely have to do with it's disdain towards the UN, its reluctance to pay the bill (leaving it to Ted Turner)?
This, until the president changed his mind, of course.
Raoul

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You point out a disturbing fact – the free, democratic nations like America and Israel are at a disadvantage because they are more open and welcoming to the press, and because their soldiers can and do talk about what exactly happened, when, how, and why, without fearing that some government goon squad is going to come banging on the door in the middle of the night and make their family disappear…

I would think that one could certainly find African and Asian nations with far better human rights records than Zimbabwe and PRC, that is, if the UN had any civilized standards to adhere to.

The UN in fact intervenes within nations as well, although not very effectively.

Americans once had admiration and respect for the UN, and paid the US portion of the bills willingly. But that was back in the days when the UN was a sensible organization. How could we be surprised that Americans now view the UN with disdain? The UN wastes so much time and energy on pointless, one-sided attacks on Israel. The UN funds and staffs schools in which Arab children are taught to hate Jews, and to kill them when they grow up. UN blue helmet troop deployments in numerous countries have done little to stop bloodshed, prevent massacres (Srebrenica) or stop terrorist attacks. UN sanctioned interventions such as Somalia end up killing hundreds or thousands, and the UN has the gall to criticize Israel for defensive reprisals that kill 55, mostly terrorists.