Things that make a crappy piece of music? Let's see...I'm sure you all know by now that the only composer I know of that I seriously, actively dislike the music of is Karl Jenkins...

Let's take a look at some of the qualities of his music that repel me like nothing else.
The hokey is strong with this one:
What is this? The genre of the Requiem meets cheesy action movie score?
Ya we get it, you heard the Waltz from Masquerade Suite and you wanted to make a version with "eerie" voices...
Ya know, come to think of it, in all seriousness, I think that's the thing that annoys me the most about Jenkin's music. Besides all the ridiculously comical attempts at drama or inspirational sounding tripe, it's the fact that all the music I've heard by him sounds like some other composer, but not nearly as deep or committed. It's like he only took the most superficial elements of all his inspirations and combined them together instead of digging around and really discovering what makes those composer's music great. Like, Palladio, an obvious nod to Vivaldi with none of the brilliance, just a hollow, superficial imitation.
After screening those three examples, I think I need to ask my doctor for an insulin shot, Blech.