Hackett was Lester 3 years ago, around that time everyone was talking about how ineffective, inexperienced and over his head Hackett was, how he was only hired as a favor to his father, etc, etc.
Just cracks me up that a guy who was deemed incompetent for the very same reasons Lester is being deemed incompetent is now the ideal OC for us because he was given the time to learn, gain experience, and as a result became pretty effective before he left, in spite of all the negativity thrown at him early on.