Jimmy Carter, the only president whose popularity rate fell below the prime rate (this is NOT hyperbole!).
I was in grad school at the time. What a disaster.
What was amazing was the COMPLETE turnaround that happened about 2 years into the presidency of Reagan. It took two years of Paul Volker's (the only good thing Carter ever did, imo) brutal interest rates to wring the rampant inflation out, but it has been a 22 year joyride since then. The last recession was child's play compared to that one.
Carter was not only inept, he was weak, small minded, bitter, and spiteful. Also, even though he was arguably the most intelligent prez we have had (he routinely explained abstruse technical matters to his staff, and had a Ph.D. in nuclear physics), he was STUPID in his dealings with the people, preferring to blame us for the morass he caused. Oh, and by the way, he pronounced it nukular, as well.
Man, was I ever glad to get rid of that clown! And then I sent my daughter to Emory, and he gave regular speeches to the polysci folks there! Sometimes you just can't win.
Carter was not only inept, he was weak, small minded, bitter, and spiteful
One person who tried to warn the USA about GA Jimmy was his lieutenant governor and fellow Democrat, Lester Garfield Maddox. Maddox went into NH early in 1976 to warn those guillible folk, and they practically ran Lester out of town on a rail.