Dashes, of all kinds need to fucking die, die, die.
While not completely fair, my burning hatred of dashes comes for word processing applications automatically replacing hyphens and especially double hyphens in code with dashes. And this never gets caught until said code needs to be copy-pasted back into a functional application, and it fails. Sometimes in weird and horrible ways. So, while it’s the auto-replace which causes the problem, the existence of dashes is proximate enough that they all need to be burned out of existence for all time.