Complex sentence: Profoundly hurt by Fanny's selfishness and disgusted with with her life as a living bibelot, Miss M. turns petulant, offending her patroness, who banishes her to her country house.
Split into simpler sentences: Profoundly hurt by Fanny's selfishness and disgusted with with her life as a living bibelot, Miss M. turns petulant. She offends her patroness, who banishes her to her country house.