He never had "it" as a solo artist, largely because he sounded too similar to TI, who was on fire. That and he was completely overshadowed by Jeezy in the group.
Stay Fresh was dope but with TI already having "Let's Get Away," it only made him seem even more like a clone. Especially since Let's Get Away was pushed as a single at the exact same time and it blew all the way up.
He wasn't wack, just was in the shadow of Jeezy & TI and could never seperate himself. Him dissing Jeezy for abandoning BNTH events after the first week of release was valid but made him look like a crybaby, especially since Jody was supposed to be the focus & star of the group. Jeezy always stood out. Nobody even listened to "Dem Boyz" past Jeezy's verse, especially in the club.
Here is an example. Jeezy wearing black when the rest of the group is wearing white, making him standout the most from the jump. Nevermind he had "it."
As you see here, minus Jeezy they had nothing as a group. Jeezy didn't show up past the first week of release, has throat surgery and finessed Puff & BNDH for extra promo for him and TM101