Rico Nasty is used to the post-tour comedown. She spends weeks, if not months, at a time on the road performing for audiences who restlessly await the days until they can unleash their pent-up rage in one of her mosh pits. And when it’s over, she readjusts to solitude. “When I come down off of a high of hella people congratulating me or hella people loving me, it does get dark,” Rico tells Rolling Stone over Zoom. “You do feel unimportant and alone. I don’t know why our brains do that to us,...