Yes and no, the confederates lost the war but their whitewashing of history has quite a bit of staying power to the point that states like West Virginia and Ohio who had massively supported the Union in the Civil War are now more likely neo confederates and agree with the south take on "the war of northern aggression" which they started by attacking federal forces and raiding federal weapons depots while backing out of the federal government allowing it to pass a law they cite as the reason they backed out of it, rather than it being able to pass because they backed out. Also the war still left separate but equal and racial discrimination on the books and the last chattel slave in the US was freed during world war 2. So what the south (Pro-confederate states) and Americans who swallowed their propaganda learned was that fighting a war without seeding the ground everywhere first with their point of view and taking over things from the inside, like they did under Wilson, arguably the worst US president of the 20th century, and Trump just took that playbook and took it farther than the public was ready for but still pushed and those special interest groups that supported him had the choice to renounce him and be reviled by both major political wings of the US or back him to the hilt while he destroys the US from within, because if you can't get everything you want at least you can make sure nobody else gets anything either.

Didn't exactly go horribly for them either. Reconstruction ended early and a lot of concessions were made on behalf of "the economy" and "unifying the nation".

They should have let Sherman finish what he started.