Spoilers ahead for the first season of The Vow. The Vow will go down as one of the worst docuseries in recent memory. Working from the captivating true story of NXIVM—a multi-level marketing scheme that turned out to also be a sex cult led by co-founder and leader Keith Raniere—filmmakers Karim Amer and Jehane Nouhaim used a wealth of footage shot by documentarian Mark Vicente and his fellow defectors Bonnie Piesse, Sarah Edmondson, and Anthony Ames, to tell a story about…it’s unclear. The first season (a second season has already been ordered) spanned nine …