Trying to organize this group is like herding cats.
herd cats
idiomTo attempt to control the uncontrollable; to attempt to manage a great many unruly factors or people to a single end.
Origin
first recorded 20th c. disputed originFormed of herd + cat, perhaps in reference to domesticated cats’ solitary nature. Possibly from the opening scene of Monty Python's Life of Brian (1979). Shepherds are discussing sheep and the topic strays to cats: "Can you imagine a herds of cats waiting to be sheared? Meow! Meow! Woo hoo hoo." Earliest usage unknown, but the idiom is attested from the 1980s.
The manager quit because trying to coordinate the disorganized volunteers felt like herding cats.
Attempting to reach a consensus among the twenty independent committee members was an exercise in herding cats, as each person held a vastly different vision for the project.