I'm like a goldfish or something. I always forget how it's likely going to go when I attempt a fic set pre-series until I get there, and then I get angry all over again.

The inability to see anything but black or white is dangerous anyway, but to apply that to John Winchester is absolutely crazy to me. Like you said, he's far more complex than that. He's like how Missouri described their childhood home: true evil walked the halls of John Winchester and left wounds which could only fester.