Evil fascinates us, and has since the dawn of human consciousness. I continually emphasize that humans are story creatures, which is good news for writers, since we’re in the story business.
Though not all stories face off evil directly, all stories must include conflict to be considered a story. Conflict isn’t, per se, evil, but great storytellers paint with words and black is only the farthest extreme. Some stories might demand a LOT of black, but others will likely run along the spectrum of “evil.”
No, the department’s budget cuts that force your MC (Main Character) to lay off twenty hardworking people she cares about isn’t, per se, evil at work, but maybe it is. For your MC? It sure feels close to it in the moment. Especially when the cowards higher up force her to
wield the ax hand out the pink slips…a week before Christmas.