Tell me, how well did Reconstruction go? Were the former slaves elevated to the status of citizens equal to their former masters?

No. The great post-Civil War failure of America was its failure to defend the gains made by the freed slave population, allowing the previous ruling class to swoop back in and reassert their power in a nearly-identical form to how it had been before. Sharecropping instead of slavery. This failure demonstrates quite succinctly why any social or economic justice movement cannot simply win the war - it must also continue to defend itself after the war, and that defense will by necessity take the form of repressing those members of the former ruling class who cannot accept the new status quo.