Complex sentence: Despite being moderately skilled in battle, her impulsiveness and thirst for revenge always gets the better of her and coupled with her inexperience in wielding a Soul Metal weapon, results in brash and clumsy attacks that are easily predictable.
Split into simpler sentences: Despite being moderately skilled in battle, her impulsiveness and thirst for revenge always gets the better of her. That, coupled with her inexperience in wielding a Soul Metal weapon, results in brash and clumsy attacks that are easily predictable.