I feel your pain. I applied 2 years in a row to the Air Force Academy and was DQd for some anti-depressants I took freshmen year in HS. I had to apply a second time since the waiver process took so long that I never got it finished in time for the first year. After multi doctors visits, calls, letter writing, etc I was finally told "History of a Mood Disorder" was permanently disqualifying with no chance of a waiver.
I know the frustration and outrage you must feel, having been given the run around only to be told it was predetermined from the start.
I would say keep at it. It is probably hopeless (and you probably realize this) but if you try showing that you do not have anti-social behavior (hell, we're pilots) maybe you can try getting that 3rd class and maybe even second/first. Keep at it.