As much as everyone is criticising Zamperla and saying “we all knew this would happen”, I think they can’t be blamed for the scale of the ride, and if you look around the world, other rides of this height and/or speed have not exactly been plain sailing.
Formula Rossa, the world’s fastest coaster, is currently closed and has been for many months. Kingda Ka, the remaining unmodified Intamin strata coaster, had an extended bout of downtime just last year. The original Top Thrill Dragster was not exactly known for its reliability. Do-Dodonpa was permanently removed recently after a life that wasn’t exactly problem-free. Ring Racer at the Nurburgring was repeatedly delayed for years while they tampered with the speed, operated for 4 days when it did open and then never operated again… the list goes on.
My point is that these 100+mph launch coasters are often unreliable, complex beasts regardless of manufacturer. We don’t know that what happened is necessarily entirely attributable to Zamperla or whether it’s simply a biproduct of the coaster’s sheer size and speed and the increased complexities that come with that. Zamperla have successfully pulled off thrill coaster projects before without issue, seemingly including the Intamin LSM conversion in Vancouver.