Training exercises give valuable lessons and experience. They reveal flawed doctrine and training gaps.
In this case the exercise may also have proven the value of a new doctrine.
Like the WW2 wargaming of anti-sub warfare, or the way the Prussians used Kriegspiel to model their extraordinarily decisive war with the French.
In any case, no-one should feel sore about it. It’s not a ‘British victory’, it’s a win for everybody involved. Learn the lesson(s), come back stronger.
The enemy will probably wait until our admirals and generals are painting their fingernails.
This is a military leadership that is still taking credit for a successful withdrawal from Afghanistan.