Darius Rucker’s ex-girlfriend criticized and insulted the singer on social media after his arrest on minor drug charges on Thursday (Feb. 2). Kate Quigley used #karma in a post on Instagram. She reportedly dated Rucker in 2020. Darius Rucker was arrested Thursday afternoon in Williamson County, Tenn. and charged with simple possession/casual exchange and driving with expired registration.All three charges are misdemeanors. Per Patton and Pittman, a law firm in Tennessee, penalty for simple possession can include up to one year in jail and a $2,500 fine.Rucker was booked at 12:15PM and released…