I refrained from answering your previous post AS.
Yes they screwed up royally. But there is always a reason why, if they were just "too stupid" to know the difference between an altitude and a flight level, then they would not have survived so long (the capt has 4000+ hrs)
There has to be more to it. As I mentioned before, the report lacks any info on previous duty and sleep / sleep pattern and other things IMHO.
But of course, they are GA pilots, so lynch them. Which brings me back to your previous post. I ask you to exchange "most" with "some".