Black people were enslaved from 1619 through 1865, then the South used vagrancy laws and the loophole in the 13th amendment (slavery is legal for punishment of a crime) to continue to enslave blacks throughout the late 19th and early 20th centuries. They prohibited black people from voting until at least 1965. Throughout the 1870s -- 1960s blacks were systematically targeted by white terrorism in the South. Every time blacks pulled themselves up by their bootstraps to create economic success, white mobs or white police destroyed those neighborhoods under false pretenses (Tulsa in 1921, Rosewood, FL in 1923 etc.).
Whites engineered the drug war in the 1960s and 70s and 80s to silence and punish black people throughout the south (read about the Southern Strategy). This became worse with the crime bill and mandatory minimums in the 1990s.
Redlining in neighborhoods prohibited even educated, wealthy blacks from purchasing homes in nice neighborhoods, which prohibited their children from attending better public schools until the 1970s. To this day, Realtors steer blacks from wealthy neighborhoods, and banks practice discriminatory lending. Black farmers, too, suffer from quicker foreclosure and discriminatory lending practices by banks:
https://thecounter.org/usda-black-farmers-discrimination-tom-vilsack-reparations-civil-rights/
And to this day, cops are 7x more likely to kill an unarmed black man than an unarmed white man.
The claims you made in your post are UNIVERSALLY false. NO OTHER RACE IN AMERICA has been so principally the target of physical and political and economic terrorism in America. No amount of HBCUs or AA laws have come CLOSE to making up for that history of systemic racism and white terrorism.
If you think that the Rockefellers or Vanderbilts benefited from having wealthy ancestors, you have no choice but to accept that the degradation and destruction of black wealth over past generations has deleteriously affected black people today.