You do realize that Duel was originally the 'Haunted House', which was a classic horror themed dark ride with a lot of the same theming, but without the unnecessary blasters and targets? I appreciate that you personally may have liked it as Duel, but that certainly didn't make it a particularly good attraction for the majority of people, especially since it wasn't originally designed to be a blaster attraction to begin with. Tacking on blaster technology detracted from a themed experience, it was never designed to be a bit of 'fun competition' to begin with.
It's slightly mindboggling that you weren't aware of all the marketing and advertising for The Curse, it's pretty hard to miss posters advertising the ride on Towers Street.