OK, so to me the two most garbage genres of music are of course Worship Music and Pop Music. Really for many of the same reasons, each has a ridiculously simplistic formula that sucks all artistic creativity from the music. So let's take a look.
There should be no such genre called "Christian Rock" or "Christian Anything." Genres of music is based on MUSIC not lyrics. So without further babbling let's look at the formula for Worship songs put to the style of rock.
Messy Mondays: How to Write a Worship Song (In 5 Minutes or Less) (via blimeycow)
I've touched on this before, I hate pop music. It is created with the sole purpose of making money so creativity is thrown aside in place of following a formula for success. Not musical success but industry success. Here is a clip of the Axis of Awesome doing 4 chords and playing many different Pop Songs just using the chord progression of D, A, B, G.
Axis of Awesome - 4 Four Chord Song (with song titles) (via random804)