Very grim indeed.
The first mistake (after electing to fly beyond capability) was to fly down the middle of the valley thereby robbing himself of the space required to make a turn and any extra lift that might be had from the updrafts close to the slope.
The second was to turn right into the higher ground, which was a very bizarre thing to do.
The third was (presumably) to apply too much bank at high altitude, especially so close to the ground.
Whilst it is grim, it is I think, a very useful educational tool and should serve as a reminder to anyone contemplating such a flight to think very carefully about it.