allowing the OTHER pilot (sic) to take a leg and have him screw up.
You sound like a gear up, flaps up and shut up type. A CRM nightmare. Allowing him/her to take a leg? How will they learn just by monitoring sky gods like you?
Of course, it could have been pilot incapacitation (PIC) and the F/O didn't have the recent skills to handle it due to not being allowed a sector because the sky god preferred to fly them all.
Maybe it was a superhero PIC (perhaps like you) who was handling pilot and the F/O didn't have the balls to stand up or announce the errors of the LHS, after all, he/she probably knew they were only there to do the radios...
In as far as never turn in to the dead engine (jet A/C) well, maybe we shouldn't bother with emergency turns/escape manoeuvres at certain airports then. We'll just accept the cumulo-granite.