On an ambiguous(this is supposed to be negative) scale based on my biased thoughts, 3/10. I think you are not good at building planes.
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Just played with your aircraft Phantom-13 Remastered, yeah it's not good.
The fuselage looks a bit dumb and too simple compared to IRL military planes, which have some more complex shapes. But these complex shapes aren't just arbitrarily designed, there is a purpose and a reason as to why they are shaped like that. One example I can explain is the F-102A (don't forget the A) Delta Dagger and its fuselage. Why the fuselage have hourglass shape? Because area rule, to smoothen the change of cross-sectional area of the plane, like turning it into a smoother oval, to reduce the drag in transonic and supersonic speeds.
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But that is too simple of an example, so try dissecting aircraft that you see and understand why the plane is shaped like that. Why is there a large bump on the hole of the inlet(J-10C and J-20)? Why is the inlet hole separated from the fuselage (see F/A-18's Inlets)? Why fuselage so wide(F-14)? Also, ask around the people who may or may not have plane knowledge (just ask anyone) why the aircraft's shaped this or that way.
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Basically, become an engineer LMAO. But on a more serious note, try imitating IRL military planes and practice your fuselage building (fuselage slicing?) skills.

Yeah I with Graingy.. ~2/10

5/10 pretty decent tbh

Depends what is considered 0 and what’s considered 10.
If 0 is the default cockpit and two blocks and 10 is a 30k part cruiser, I’d say you’re a 1 and I’m a 2.
This game has such a high skill ceiling that this isn’t really an easy rating to give. Besides, good visuals ≠ advanced physics model ≠ advanced FT/XML.
Even with visuals, some people get good results but only use simple techniques, while others may be dependent on more technically demanding techniques to make things look good.
It’s art, and art is tough to rate when you haven’t given any sort of parameter by which to judge.