To me, this moment is one of the failure points in the incident and is entirely the captain’s fault.

Captain: What the hell are you doing?

Benin: We've lost control of the plane!

Robert: We've totally lost control of the plane. We don't understand at all... We've tried everything

Now, instead of a team working jointly on a problem, we have two juniors feeling that they have to justify and defend themselves to their captain. It’s a really poor psychological position to be in with a time-critical problem to be solved.

It’s a human response, obviously, but I’m betting it’s the opposite of what his training would have recommended.

IMO, in that moment, the Captain either needed to get his crew problem-solving, or take control himself. unfortunately he did neither.