Fred,
They didn't just cock up the GA around. They didn't manage a resulting simple problem. They flew poorly. They created additional warnings. They missed checklist items. The cocked up performance. They mis calculated fuel. They incorrectly managed fuel. They created a situation requiring a MayDay call. The landing sounded ok though.
I am always against the mob mentality here but this was not one error. There were two professional, trained crew there. I agree though the why and what next is the most important aspect.