Only the USA had "chattel slavery". In fact, you invented it. All of the other civilized nations in the world ended slavery in 1810, but the USA not only clung to the notion. You compensated plantation owners for their "property" when Lincoln freed the slaves, but you never compensated the slaves. Just freed them, and turned them loose with nothing.
Carter was not in the least bit "awful". He's the guy that green lit all of your "smart weapons" that won the Gulf War for you. But he wasn't a Washington insider, and he didn't have a good grasp of how the Federal government worked. He was considered "too honest" for Washington. Then he foolishly decided not to campaign for re-election as long as the hostages were being held in Iran.
Trump didn't start a war, he just let a pandemic run loose in the country and killed a million people that way.