With Poetry, Insults Can Have A More Measured Tone
There are some musical styles that are highly malleable, allowing you to say nearly anything with them. You can express yourself through these styles in a variety of ways. If you compose your insults in the form of poetry, you will be able to give them a more measured and thoughtful cadence.
This person made the decision to use a well-known poem as the foundation for their work, possibly for aesthetic or practical reasons. The message, which was originally intended to be romantic, has been changed to something that is a little bit more harsh. Based on this essay, it appears like they are prepared to move on from their previous relationship.