While the cause of the train incident is undisclosed, it has been confirmed that it is at the fault of no SDC employee. I am close with the train crew, and they are so passionate in their job that they wouldn't have let any of this happen. The maintenance foreman also declared it is nobody in the train maintenance crew's fault. It is extremely hard to wreck SDC's train unless you are going extremely fast, and considering the train settled on the inside of the curve, speed was not a factor.
I believe it had to do with a kingpin connecting a truck to the frame of Car no. 3. In an on-ride POV filmed 4 hours prior to the wreck, you can see the car is riding a lot rougher than the others, especially on the curve it derailed.
They won’t listen, it doesn’t fit their narrative of “SDC is going downhill and they don’t care!”
Freak accidents happen, and can happen more than once in a span of a year. The fire was a simple grease fire that got out of control too quickly for anyone to even do anything. The worker on TNT, bless his soul, died because of his own error, not the parks or any other employees. And like you said just said with the train. But hey, SDC bad!