This is the final season of this show and they decided to spend an episode on a character that wore out his welcome in the first season.
This might be an unpopular view, but in my opinion the first series tanked right at the end as it strayed from the funny and dwelled in the serious. I've no problem with the show addressing the dark aspects of Kimmy's confinement, but the courtroom drama left the laughs thin on the ground.
Well in this episode they're pretty non-existent. I smirked a few times, but that's about it. The entire episode is devoted to a exploration of the back story of Kimmy's captor, through the lens of an entirely new character. It's quite competent and well made as a spoof of a documentary show, but it's so lacking in laughs it really fails to justify itself.
This is the *final season*, and there are only a few episodes left. This episode is simply a waste of valuable time that could have been spent on the characters we know and love, instead of crafting a "worthy" episode for the critics to fawn over.