You gave no indication that you even listened to any of the score before giving it one star, based on Clemmensen's review. If you did, well then you're entitled to your opinion. If you haven't listened to the score, then your opinion is about as valuable as a pen without ink. If you can't back up an opinion in any way, then you aren't entitled to one.
That said, Clemmensen's review is fairly accurate. 3 stars is a decent review. I'd say 3.5, personally. However that is simply because I did find the score to be an enjoyable one. I can see how one may find it to be less than enjoyable, and those people are entitled to their opinion.
Finally, as far as him giving a John Williams score three stars, look at his composer tribute for Williams and you can see that he's given a number of three star reviews to past projects.