I lived through his presidency and came out flat broke and out of business. His administration was much worse than a simple failure, it was an unmitigated disaster both at home and abroad.
The only thing that kept him from being the worst president in American history was Bill Clinton. And that was only because Clinton is a traitor who sold military secrets to our enemy. IMHO Carter should be jailed for criminal incompetence, and Clinton should be in Leavenworth for betraying his nation to the enemy.
Oh, Carter did his bit for treason, too. What he did to the military should have been punished under treason laws.
That reminds me of one of my favorite bumper stickers from the Clinton era: "Carter used to be the worst president."