I dislike Appletinis made with the poisoned apple from the witch of Sleeping Beauty
(Full disclosure: I never had an Appletini before and likely never will).
I dislike Hellenic brothels run and patronized by the Greek gods and goddesses. Too many people being turned into rare trees and plants on the smallest, most arbitrary reasons.
I dislike olive oil based headache medicine/treatments. Even if they exist, they literally wouldn't work to help or relieve the person of his or her nagging headache.