I am not sure I can do hate as such when it comes to music. There are a lot of records that don't appeal to me. I agree with an earlier poster on Whitney Houston. Yep. Melisma is atrocious unless it is used sparingly.
The biggest criticisms are for the lack of imagination and sheer repetition so far in this century's music. It is probably inevitable that we are on generations three or four of heavy rock, indie guitars, electronica and even rap but with a few exceptions none have gone beyond, say, two generations with great inventiveness.
Folk, jazz and world music still do some interesting things on the margins but even they can seem overly taught. Proper soul and reggae have all but disappeared. Autotune invades much so that it becomes like a Cowell or R n B production. And I find it almost impossible to listen to either. I hate it because it isn't music.