The hateful, race communist Jimmy Carter had no peer in the evil he backed, funded, and enabled across the globe through both his presidency and post-presidential life.
More at those threads.
Every single thing he touched became death and misery, and he loved every brutal killer/terrorist/dictator he ever met, from 'Palestine' to Iran to Venezuela, Cuba, Rhodesia you name it. His horrific acts were only amplified by his uncanny ability to find and hire horrible people.
Ronald Reagan was able to become such a great president in part because he had to fix so many enormous disasters as best as possible which his predecessor handed him, geopolitically and economically alike. Obama and Peepaw were rank amateurs compared to him, only more impactful in their destruction of the American judiciary.