Angry parent rock originated when stupid band members were finally allowed to write their own songs by their agents and managers. These band members, having the brain power of a 92 year old that has been dead for the last ten years, ended up writing an album or in some cases two or three with all songs consisting of no more than two chords and vocals with a mildly abrasive voice saying how disappointed he was in his father.
song writer 2: yeah that is sooooo cool and ill sing "FATHER YOU MAKE ME ANGRY. WHY WONT YOU DIE AND BURN!!!!"
song writer 1: (crying) oh why won't father support my music career.