Complex sentence: Cersei's reign is marked by rampant cronyism as she tries to solidify her rule by staffing her councils with incompetent loyalists and disregarding well-meaning and accurate, if blunt, advice from her uncle Kevan Lannister and her brother Jaime, alienating them both.
Split into simpler sentences: Cersei's reign is marked by rampant cronyism as she tries to solidify her rule by staffing her councils with incompetent loyalists. She also disregards well-meaning and accurate, if blunt, advice from her uncle Kevan Lannister and her brother Jaime, alienating them both.