There is no such thing as the "best music" because music, as an art, is completely subjective. Different types of music elicit varied responses in every person, and some prefer one genre over another. For many, it depends on what they listened to while growing up, or what they heard at important, formative times in their lives.
Notwithstanding, Classical music as a genre does have its strengths . The term "Classical Music" for most refers to Western Art Music written between 1500 and 1950 AD, which is an enormous span of time comprising of innumerable sub-genres, composers, instruments, and pieces of music. It can be hard to really engage with music written so long ago because it incorporated different aesthetics that may seem alien to our unfamiliar ears.
My advice would be to give it a try! The best way to enjoy Classical Music is to understand the background and stories that accompany each piece. For example, Tchaikovsky's 6th Symphony becomes much more interesting after learning about the rumor that he was forced to commit suicide by the Tzar for an illicit love affair, which explains the symphony's tragic character. Berlioz's Symphonie Fantastique was written about a crazed lover who takes opium and hallucinates his own death and journey to hell. And much of Shostakovich's music subtly protests the oppression of his Soviet overlords, as heard in his String Quartet no. 8 and Symphony no. 4. Perhaps you should consider taking a music appreciation course! There is so much great art to enjoy within Classical Music, as with every other type of music.
