Form letter is perfectly fine IMO. The biggest problem is the lack of any response whatsoever is that you cannot simply move on with your job search. Frankly i

Form letter is perfectly fine IMO. The biggest problem is the lack of any response whatsoever is that you cannot simply move on with your job search. Frankly it's just rude and unprofessional, I don't care how commonplace it is. More detailed feedback is a nice to have, I certainly appreciated it when I got it, but it's a different thing from being ghosted altogether.