I am a resident of a Govt Medical College and serving in govt health service for quite long. I know about public health a bit more than an average person do. I know the protocol of an outbreak, the surveillance method, data collection, analysis, response framework etc. WHO has a clear cut protocol, when something new is emerging, be prepared for the worst. But in this case, they didnot follow their own rules. You people are saying that what would they do if they do not get access to all the Govt data in a country? You are right, but they could say that they could not get adequte information about COVID, so be prepared for the worst. But they said otherwise. No one is blaming them for others' failure to respond in a better way and accusing them for all the death. But they also just cannot blow off their resposibility.
By the way, did you work with WHO? They are not a toothless organization with bunch of doctors, if you give them proper access. In our state a WHO advisor is attached to each district headquarter to look after all the public health issues and national programme in liaison with the district public health officer. He has access to all the public health data available, can make field visit at will, stays in all important meetings and gives input in all policy framing regarding public health issues, and his opinion is always taken with utmost impotance. So this is possible if you give him PROPER ACCESS into your system.