It is because the haunting and elementary evil choir,the menacing brass section and the bombastic percussion,and the dissonant and haunting string section.I agree that this score might sound alien to those who like the patriotic,bombastic Star Trek scores by Horner and Goldsmith,who are often has darker and brighter moments in a track as well,and a lot of relaxing tracks which give the feeling ,,Each cloud has a silver lining'',although I must mention that Eidelman finishes with his score with a fantastic and relaxing track which gives ,,Each cloud has a silver lining'' feeling - this track is Sign Off.The End Credits also contains darker and brighter moments as well.But still,it is a dark score in general.I recommend for those people who like dark and haunting music,but I personally know some Star Trek fans who like it,so it is worth trying.