Brady is young and shrewd. He makes a lot of media plays. Payton hated him - probably reminded him of himself.
Q) What if Brady knew he wasn’t getting the job ? Would he interview for it again ?
A) No. given his MO. He’d decline the interview. Leak it everywhere and make himself look good and make the Saints look bad.
Q) What if he knew who was getting the job ?
How would he know ?
A) who’s his agent ? Let’s say he had the same agent as another candidate ( or some other mutual connection I guess )
Saints look really bad. But he likely wasn’t getting the job anyway and he knew it.