We look at guys who were busts and we say they were terrible quarterbacks. Well what you probably forget to realize is some of the so called "busts" were on terrible teams. Which doesn't help your development at all.
Not saying all busts were ruined by their teams but some were. Also, what we forget is injuries can last out through your entire career and can slow down your production.
But let's take a look at the guys who were, but shouldn't have been busts.