Hundreds of thousands dead and more maimed or blinded or traumatized for life, enormous economic carnage (not talking slavery just all the physical capital that was obliterated by strategic necessity), and the looting of state treasuries by every form of unscrupulous war monger?

Few of the slave owners were the ones that fought and died. Those were poor whites almost exclusively. The plantation owners were absolutely fine.

That the confederates managed to reconstitute as a rump political force inside a generation didn’t spare the Southern States from underdevelopment, exploitation, and grinding poverty for the next 180 years

Those same former slave owners are the ones that underdeveloped the South so that they could exploit cheap labor and continue superexploitation of Black people.

The Southern slaver aristocracy should have been executed.