Rick Cook notes:

Not amazing at all. Sometimes planes that look terrible also fly very
well. The F-4
Phantom II was widely criticized as butt-ugly when it was introduced
and
the P-47 wasn't exactly considered beautiful. The DeHavlind Comet was
much prettier than the Boeing 707 but it wasn't nearly as good as an
airliner (even leaving aside the Comet's design flaw).

I have to wonder about the Crusader (F8). We had a couple squadrons of
those things at Kaneohe Bay back in the late '50s, and, in one sense,
the Marine Corps loved the job their machine guns would do. But the
pilots said it was unstable as hell during landing, and had the glide
ratio of a rock. Last fighter aircraft built with guns as the main
weapons system, by the way. It looked a little more like an old
seaplane than a jet fighter from some angles.