1. Germaine De Randamie
Congrats Germain De Randamie, you are the worst UFC champion of all-time. While numerous champions on this list won a title only to lose it a few weeks later, GDR never even attempted to defend her title.
Not long after winning the inaugural UFC Women’s Featherweight Championship, GDR announced she was vacating the title, moving back down to bantamweight, and would not defend the title against Cris Cyborg. She would blame Cyborg’s history of PED-use as her reason.
For not even attempting to defend her title against the consensus number one fighter in her division, Germaine de Randamie is the worst UFC champion of all time.