You're confusing marketing and promotion. The promotion was good, as you said in the first paragraph. The overall marketing of the attraction (e.g. its brand, who it was aimed at vs the nature of the experience) was what killed it.
The ride was positioned by marketing as a high-intensity thrill ride comparable to Saw, when in reality its super floaty and hella boring and probably the 'tamest' of the big 5. It should've had a lighter-tone theme and been pushed as a less intimidating ride, something to introduce new riders to the bigger thrills of the other coasters, giving it the approachability it warrants. This would've been especially useful as the park seems to lack from an outside perspective an 'in-between' coaster. More thrilling than X and Fish, but not as intense as Saw, Inferno and Stealth.