Hiding, i.e. not publicizing, negatives of Klal Yisroel is a Kiddush Hashem. It would be a Chillul Hashem to broadcast negatives.
Appraising one’s faults is surely a good thing. And we should all do that for ourselves and improve our faults as we work to fix them. But not putting the klal’s faults in the newspapers. Or on the internet.