Some songs are so bad, they're good. Meaning "fun" or "entertaining" or at least "interesting"... But few songs can claim to be so dreadful, you actually feel physical pain while listening to them. So bad are these damned few that you don't experience them or listen to them: you "endure" them. This is the mother of all such songs!
"Perfect Illusion" is without a doubt the most inept and atrociously awful song ever made. Its poorness is so extreme that of itself it is the song's strongest selling point. A good structure is non-existent, the production makes Steven Seagal look like a member of the Royal Shakespeare Company and the singing could have been less horrendously botched by a blind Eskimo with no arms. It is also painfully slow. This song might barely last 3 minutes but you will feel like you've aged ten years by the end of it. That's what makes a song truly bad: the fact that despite its overbearing weaknesses it isn't even entertaining!
In the end I can not advise against this strongly enough. This is for the masochist in you (or the sadist if you insist on showing it to friends). Any other part of your person can only feel pained or offended by such extreme trash!
