The reason the South wanted to secede from the union is within the name, "Confederate".
Con (as in pros and cons) means "against".
So the South was AGAINST having a Federal Banking system, which would allow the North to take money earned by the South's export market, and apply it towards welfare for the lazy Socialists in the North.
As far as the South was concerned, they were the ones who earned money, therefore they had a say in how it would be spent:
Improvements in agriculture,
Shipbuilding so they could control their own exports,
Universities and hospitals in the South,
And, yes, even dissolving the need for slave labor.
But the North hated the idea of losing their cut, so they spread false rumors (Uncle Tom's Cabin was a work of fiction) and propaganda, to prevent Europe from interfering with the North's invasion of the South.
They waged war, blocked Southern shipping ports, bombed railroads, burned crops, raided homes, raped Southern women, and cut off supply lines of food, forcing the South to give in to their bullying.
But even after the Civil War, the abuse didn't end.
The South wasn't given adequate representation in Government.
Western migration was blocked so any new states would belong to the Democrat Party's Socialist platform, further hampering the Southern Capitalists' political voice.
And whatever wasn't stolen during the Civil War was "Taxed" by the Northern Carpetbaggers, leaving the South in ruins.
Now you know.