Maintaining morale during a war in the midst of a withdrawal is a daunting task. George and Nelson are doing their best with what they've been dealt as is Jervis.
George hides his disappointment of not being sent home well. Maybe he should have tried a convincing tale of baiting the enemy with a tactical withdrawal.
This is the most desperate battle George has fought to date. It comes too quickly after Travers' demise. It showed the possibility even the best ship, bravest men, and expert leadership cannot always forestall defeat or death. In this case George may have luck on his side.
George was a bit cold ridding himself of Darby. In doing so he is trashing Travers' last request.
There is nothing more effective than negotiating from gunpoint.