Worst Fandom Dad #7: Hunson Abadeer (Marceline's Dad)
Now for an Adventure Time dad.
Hunson Abadeer a.k.a. Marceline (below) the vampire queen's dad.
So what exactly did he do that's so bad? Well, for starters, he's The Lord of Evil and ruler of the Nightosphere (basically the Land of Ooo's equivalent of hell). So he's essentially satan. Not exactly great father material am I right? Then, one day, he does something that his daughter can never forgive. HE EATS HER FRIES. As shown in the above video, the only way Marceline is able to express her angst about this is through the medium of song.
While I'm aware that Marceline and her dad are able to make amends of a sort later, I'm going to ignore all of that for the purposes of awarding him with the "Worst Fandom Dad" title. In any case, what sort of dad EATS HIS DAUGHTER'S FRIES?! A monster, that's who.