In any aviation incident, it’s generally a good idea to wait for the full NTSB report before drawing any firm conclusions.

That said, it is exceedingly difficult to find any explanation for what happened in this case that doesn’t boil down to incompetence or gross negligence.

There were so many opportunities to avoid this accident. The crew seemingly more or less single-handedly punched a hole straight through the entire Swiss cheese model. It’s so bad it’s hard to imagine they weren’t drunk at the controls.