Brandi Glanville came out swinging against NBC, Bravo, Warner Bros., and Shed Media in a scathing letter that claimed she was “used and abused” while on Real Housewives of Beverly Hills, alleging they coaxed her to drop a 2015 court battle with franchise costar Joanna Krupa. “Glanville has always been nothing less than a loyal soldier for NBC,” the letter written by lawyers Bryan Freedman and Mark Geragos and obtained by RadarOnline.com stated. “That is partly because, for many years, Bravo has been dangling carrots to keep Ms. Glanville in line.” Her attorneys then cited her legal drama with …