AUT, you know damn well that Mel was the perfect choice, but he didn't like your friends in TPF so he had to go. Mel was one of the few people left in Soldier, who knew What Soldier used to stand for, and knew the majority of the people, but you couldn't let him revert to Soldier's old path, so you threw him away, and put magic in charge.
And your surprised by his actions? You had him picked to lead, until you learned that he stood for the same things that you used to stand for. And you had already named him Chairman, which means, you were indeed Nothing more than a regular member, but you used the blind devotion of the Soldier members to support magic taking over.
TGR made a wise decision here, and I really am sad to see Soldier disband, but If you want to find the reason for it's down fall, look no further than yourself AUT.