Why the UN can be no true champion of Human Rights

Yes I know its obvious but here we go again.

The UN report on the end of the Sri Lankan civil war details truly appalling human rights violations :

The panel, which did not have an investigatory mandate, blamed the victorious Sri Lankan forces for killing tens of thousands of civilians, and said there is "credible evidence" that war crimes were committed by both sides.

However what will now happen, can you guess ?

Because Sri Lanka is not a member of the International Criminal Court, the U.N. Security Council would have to vote to ask the Hague-based court to probe war crimes, since the government will not permit an investigation.

Russia and China, which both have veto power on the council, and India are opposed to formal Security Council involvement in Sri Lanka, diplomats told Reuters. Practically, that means there is little chance of an international investigation.

Oh well, move on, nothing to see here. Yet again a country gets away with horrendous crimes because of the obvious nonsense of Russia and China having vetos in the UN Security Council on this kind of issue.

Where is the international campaign to reform the UN on this issue ? It seems a pretty big HR deal to me, don't you agree ?