Derek Hoke did not mean to write such a downer album, but once he realized how much he was holding in, he decided it was time to purge. Hoke, whose songs tend more toward a Hank Williams-inspired rockabilly than flat-out sadness, grew up in Brunswick, Georgia where, at least in his eyes, Garth Brooks was equal to Fugazi. “If I was on a therapist’s couch, this is what I would be talking about,” he tells me about Bring the Flood, his forthcoming album, out this Friday…