A former coworker, we were paramedics together, went to the FBI. He loved being a field agent and killed his career by not taking promotions and choosing to stay in NC. He said there are three types of FBI employees: 1) people who just want to be field agents, and who loathe the administration and leadership; 2) the people who hate being field agents and promote as soon as possible and who are political; 3) people who never leave DC. He says that 98% of the people who encounter the FBI deal with the first group.
All that is not to say some agents don't follow in lock-step with everything sent down from DC, but it is to say there is a very real disconnect between the people who actually do the work and the people to run the department.