The vast majority of African-Americans (to use their term) are doing just fine, thank you very much. But the media doesn’t like to point that out.
Let’s start with 85 IQs and no impulse control—everything else stems from that.
The betrayal of black children in public education--and some white children, as well--has been documented for over two generations: See the discussion of the Clairette Armstrong study in Making Minorities Dependent.
As for the terrible results from other efforts at social engineering, which afflict all races, Unintended Consequences.
In summary, their are legitimate grievances. Where the narrative becomes the "Big Lie," is in the Leftist attribution of blame & causation. Over that, there should indeed be outrage.