Scratching - You know where in the middle of a song you hear like turntable scratching. Limp Bizkit is an example of crap music being worsened by this

Overdoing the music - Yo mightnt understand this but like in Tears In Heaven he completely overdid it. Too much messing around. The MTv unplugged version showed this.

Too much distortian - Distortian can sound great or it can sound crap and ruin a song. dont know about you but this is obvious in alot of grunge/thrash metal.

Fat gaylords pathetic attempts at rappin - This may lookj like a blatent attack at Limp Bizkit. Which is partially true.

What else?