Carter was probably not as bad a President as he was maligned as. Unfortunately, he was overwhelmed by events, chiefly stagflation, the Soviets behaving badly and, most of all, the Iran Hostage Crisis. Reagan got to take credit for some of the things he did, namely the release of the hostages, the efforts of Fed Chairman Paul Volcker, a Carter appointee, to finally crack the inflation riddle and set the table for the economic boom of the 1980's and some of his efforts to get tough on the Soviets which began the process of communism starving itself to death. What ultimately doomed Carter in 1980 was his one debate with Reagan which came about a week before the election. Prior to then, the race had been neck-and-neck. After that debate, Carter's support collapsed. I often wonder if that debate had happened a month earlier and there were additional debates if that race would have turned out differently.
It's eerie how many parallels there are are to Carter and Biden--both were good, decent people but, fairly or not, became tagged as unacceptably weak leaders and who were largely controlled by events that were out of their control--inflation, a Mid-East crisis and Soviet/Russian muscle flexing. And, very frustratingly, Trump will get to take credit for what Biden laid the foundation for--a growing economy (wages are catching up with inflation) and a world stage on which Iran's ability to cause trouble has been degraded (and the esteem of the Iranian regime may also be degraded a bit with the proud Iranian people) and Russia is stuck in a stalemate--so long as Trump does not screw it all up (no guarantee of that). History will ultimately be kinder to Carter and should be kind to Biden.
