original: His misadventures are often fueled by his immature mannerisms and his love of food.
simplifications: His misadventures happen because of his immature mannerisms and his love of food. His mishaps are because of his immaturity and love for food. His bad adventures are often created by bad manners and his love of food. His misadventures are fueled by immaturity and  love of food. His immature mannerisms and his love of food drive his misadventures. His misadventures often happen because of his immature behavior and his love of food. His adventures usually involve his immature behavior and his love of food. His problems are usually caused by his immature character and his love of food. His misadventures are often fueled by his childish behavior and love of food. His problems are often fueled by his immature habits and his love of food.