1. Since that was a century and a half ago, you're asking the innocent to pay for the sins of their ancestors, and we don't recognize collective racial guilt. And if you want to assign things by race, only whites ended slavery for the West and later the whole world in what was a world-wide institution.
2. Affirmative action was set up in the US to offset the harm of Jim Crow. We're three generations later and it is still in effect. Yes, it has been mostly used by middle class and upper class blacks to their own benefit, but many have benefited.
3. Due to blacks choosing welfare at high rates when it was expanded in the 1960s, illegitimacy in the black community went from 25% to 75%. This has disproportionate payment of welfare to blacks vs whites, as well has higher crime in the black community. How much of the trillions in welfare they've received count as reparations?