At least that one was a one-off built by a company with no prior experience. An even worse offender in the same category is Vertigorama at Parque de la Ciudad in Buenos Aires. It was built by Intamin and Giovanola in 1983 and has remained SBNO since.
Granted, that probably wasn't the fault of the manufacturer, because the park was always struggling ever since its construction, but they still managed to have five other coasters operational for 20 years (one of which was also built by Intamin). However, they never managed to finish Vertigorama. As far as I can tell, Intamin never sold another coaster like it either.
The biggest mystery nowadays is why the coaster hasn't been torn down decades ago.