In which I endeavor to convince even one person that this episode isn't the complete trash Chuck seemed to think it was... I am fairly certain the main reason he hated it was because he wasn't really interested in the deeper character narrative of Dean's tormented childhood.

Links and things referenced in this episode, and helpful references in general:

Last time for Kripke's original five episode arenas

My tag for this episode

and last but not least, the Superwiki page for Bugs