My editor and I are listening to music and I mentioned that one track sounded like the early 70s folksinger, Melanie. Immediately we started talking about her hit "Look What They've Done to my Song." We needed to see who wrote it. My editor thought Harry Nilsson did, but it turns out, according to Wikipedia, Melanie herself wrote it.
Now here's the "I want to shoot myself in the head part." Apparently in the 1980s, the Quaker Oats Company used a version of the song in their commercials for Instant Oatmeal. They revised the lyrics to "Look what they've done to my oatmeal."