your loss, if it just had food and water in a tiny area and left alone it would have healed, it's not going to eat from the stress of you handling it and it being alone from it's friends.
DON'T KILL IT or GIVE UP!
This happened to one of my California quail about a month and a half ago, it's completely fine now.
I found a California Quail one morning hanging by its leg from a tree branch in my aviary, it was about 2 months old too, it's leg was dislocated like that, and I...