A couple of times bounty manager is the one who was being blamed for the unsuccess projects. Not realizing that bounty managers are just doing their job whatever the owner wants him to do. And it is true that bounty participants are juat joining any ICO or any signature campaigns without further realizing that it is not worth to join for.
Being a bounty manager isn't an easy job. Reputations, good image, efforts and time are needed and I understand where OP is coming from all of his sentiments.
Indeed, bounty managers are just hired employees with a pretty good salary because of their management skills and experience, they are not an official member of the project but a lot of people often blame them for the failures of a project, the impatience and agitation are understandable from the participants but maybe they attacked the wrong object. In addition, the bounty manager has only a few contacts with the project, they do not have the right to decide or ask anything but many participants still ask very difficult questions to answer, and asked many times while there was an answer ahead