How did Civil War champion become a disgraced figure, and the champion of slavery become a hero?

[bigtree]

5. as I said

...the article answers that question more precisely than 'Grant was a pretty bad president."

While true that his administration was scandal-ridden, there are many aspects of his presidency regarding his attention to the plight of blacks which are ignored and dismissed - much of that dismissal over the course of history a consequence of the denigration and oppression of the black population after Reconstruction.

"...Indeed, for as much as scandal plagued his administration, it’s also true that many cries of corruption came from angry and aggrieved Democrats, who attacked military intervention in the South as “corrupt” and “unjust...

...as historian David Blight writes in Race and Reunion: The Civil War in American Memory, Lost Cause advocates would canonize Lee as a “blameless Christian soldier, a paragon of manly virtue and duty who soared above politics”—but it would fuel other narratives: that the nation should honor Southern bravery, that the Union’s victory was one of numerical superiority and not tactical skill (it’s in this that we see the claim that Grant was a “butcher” of men, despite all evidence to the contrary), that Reconstruction was a disaster of federal overreach, and that white supremacy was the proper order of things in the United States"

Three books on Grant I would recommend reading:

'The Civil War and Reconstruction' by, J.G. Randall and David Donald

'Grant Takes Command', by, Bruce Catton

'Grant - A Biography' by, William S. McFeely