Complex sentence: Of the lyrics, she judged that the combination of McDougall's sorrowful lyrics and the erratic melodies results in a "distasteful musical theatre sound" and that "the blunder is only worsened by her bizarrely melodramatic vocals".
Split into simpler sentences: Of the lyrics, she writes that the combination of McDougall's sorrowful lyrics and the erratic melodies results in a distasteful musical theatre sound. And that "the blunder is only worsened by her bizarrely melodramatic vocals".