True enough. With Captain Britain, I think it's very much that Brian is out of his depth here - and also that Moore rarely resolves a plot by having the hero punch it into oblivion.

One of the things I liked about the story is that none of our heroes are capable of beating the Fury in a straight-out fight - there's no 'villain decay' and it keeps its menace to the final seconds...

This is also the payback for an extended storyline in which Captain UK has been traumatised by the Fury killing her world's superheroes - including her husband and everyone else she knew. In the Fury's previous appearance, before it upgraded itself, she wasn't able to face it at all. Only the Special Executive's intervention kept the cast alive.

There's also the question of whether the fight would have gone differently if Captain Britain hadn't attacked it first - this was effectively a Captain Britain / Captain UK tag team finishing it off after the fight with Jaspers left it weakened.

(On a tangent - from vague memory, didn't Chris Claremont pretty much use the Fury as the basis for Nimrod...?)