Mozart, because his music doesn't express anything to me.
Beethoven, for the same reason plus he's dull sometimes.
Chopin, because his pieces sometimes beg me to be emotional to the point of being pathetic.
Liszt, because he drowns his point in a sea of nonsense.
So a fairly ordinary list i guess, the usual suspects. There are others too, but not worth elaborating. In fact i always felt like 99% of all music is not really worthwhile, so i judge by the 1% brilliance i can find.