There is a fine line between independent representation to support individuals when faced with an organised organisation that attempts to subvert 'natural justice' and independent representation to support individuals who do not agree with the way that they have been treated. Who decides who to support?
Not unconnected is the quite justified hesitation about creating any 'independent' representative body for the armed forces that could be subverted by any political factions.
I find it incredibly sad that such 'closed ranks' attitude and behaviour that you highlight still exists.
Good luck. I hope that you can engender an ethos where you will not be required.