Well what can I say? If a kid has that situation the teacher would never know. Thankfully there are few that have that kind of mentality. And there are kids who have amazing skills but still fail because they don't turn in their work or follow procedures. At the end of the day there will always be kids who go out of their way to fail. And that's okay! For me the important things is knowing what my part in it is. If the kid is as self-defeatist as you were (no offense) they have pretty much insured they will be miserable.