The picture looks definitely like it was very slightly blurry originally, which of course is very apparent in such a motive. There is also a very slight chromatic problem, visible on the wheels and the cockpit frame (maybe part of the blurriness). On the underside of the fuselage, it looks like you tried too much grain reduction (look at the hatch below the second guy).
I don't know which lens you used, but maybe it all comes down to it not working anywhere near its sweet spot! Don't know if all this can be corrected without seeing the original, but looking at this edit I can see the quality rejection.
Just sit back, relax and have a glass of Merlot...enjoy your life!