Are you sure you had a thorough pre buy done? Between that janky panel wiring, the corrosion under the fuel cap, simple things like unplugged connectors being missed, I’d be having some serious words with who ever you paid to do that inspection. Stuff like that should have been caught and noted by even the most unscrupulous mechanic.
I have to agree with the sentiments on the paint job. While it may look nice from 15 feet, the close up photos that you’ve posted show a paint job that was hastily applied, and where the preparation is in question.
I understand you may have an emotional attachment to this aircraft, but don’t take it personally. People are trying to help you out, and it seems as though you may be blinded by rose colored glasses. It’s important with something as complex as an aircraft, to which you are entrusting you life and the lives of your family and others, that you be vigilant with stuff that you find, no matter how insignificant it may seem.
It’s not so much the corrosion on the fuel neck that’s the issue itself, that piece can be replaced. It’s that the things which were missed were so obvious, what else is wrong with the aircraft that you haven’t found yet? I have a hard time believing that airplane was stored in a hangar, unless it didn’t have a roof on it. I suspect there is much more corrosion to be found behind access panels, etc. I hope you got one hell of a deal on it, there are unfortunately lots of garbage airplanes out there where buyers are conned into ownership by a fancy looking paint job. Someone went to the trouble to spend all that money on paint and a J model windshield, but couldn’t be bothered to install the radios properly? What else was done half-assed?