General opposites:
* Dismay
* Distress
* Horror
* Aversion
* Dread
* Misery
Specific opposites:
* Disgust (opposite of finding something pleasing)
* Boredom (opposite of finding something exciting)
* Pain (opposite of physical delight)
* Grief (opposite of emotional delight)
* Disappointment (opposite of finding something fulfilling)
The best opposite will depend on the specific context in which you're using the word "delight."