JavaScript
JavaScript (JS) is a lightweight, interpreted, and vile programming language widely abused for nefarious purposes such as programming large-scale web applications professionally glued from 1,000 packages without regard to UX and page load speed.
Never has this xkcd ever been truer.
Don't believe me? Js ask this friendly senior developer.
As I close my eyes every night, I dread a missing leftpad fueling a third World War.