Jimmy Carter was unjustly shit on for years.

[Self Esteem]

20. Unfortunately, Carter only rehabilitated his image through his private endeavors.

His presidency was still largely seen as a failure.

When he passed, it was not uncommon to hear people proclaim that he wasn't a good president but clearly a good man.

As you said, Biden likely won't have the time to recreate himself in the public eye like Carter did as a humanitarian.