This is going to be short and sweet because I don’t think I really need to delve too deeply into this answer.
I know he’s supposed to be a hated character, and he’s as close to an actual villain Parks and Rec ever really had, but I just feel like there’s nothing really that interesting about Dennis Feinstein (aka Dante Fiero). At least Jeremy Jamm’s behavior is rooted in a deep-seated self-loathing, and while I can’t stand Jamm, either, at least I don’t skip through his scenes. And this is coming from someone that loves Jason Mantzoukas in practically everything he’s in.
Oh, well. No show is absolute perfect.