Are you learning anything from her? Is it worth your time and hurt feelings? Maybe tell her that you would also like some positive feedback cuz her negative feedback is NOT helping you to love this passion for quilting? Maybe she doesn't realize how she is coming across as the quilt police, cuz she loves quilting AND perfection. ??
Maybe she just isn't your kind of instructor. Does she seem like someone who you would like as a friend? I ask cuz usually people we 'connect with' make good friends and good teachers. If you don't like her, go somewhere else.