Please explain why I, a 17 year old, didn't like it.

Now before you start mentioning Twilight, quick-cuts, and the awful movie tastes of young people, I must tell you a bit about myself. I have never seen Twilight, I am not a fan of quick-cuts and shaky cam, and I really don't watch that many new "blockbuster" movies. Once Upon a Time in the West, Casablanca, 12 Angry Men, The Dollars Trilogy, The Day of the Jackal, It's A Wonderful Life, The Sting, Sleuth, & The Big Sleep are, among many other "old movies", some of my favorite films. But, I really didn't enjoy Spartacus. Apart from the very sly and witty performances from Peter Ustinov and Charles Laughton, I felt like Spartacus was dated, melodramatic, and slightly tedious. Most of the characters, aforementioned excluded, were weighed down by flat and uninteresting dialogue. The Music was verbose, exaggerated and painfully repetitive. And, the plot, though interesting on paper, was carried out in an almost simplistic manner. Ultimately, any emotion elicited by the film was due to the situation and not the execution. I guess i am wondering why this has such a high rating? An 8.0?
I just don't understand.

Thoughts anyone?

"Alas! poor Yorick. I knew him" Hamlet in Hamlet