Fans took to Reddit several years ago over this exact issue, and seemed to think the worst filler arc is The Allied Mom Force!! from Naruto Shippuden.
This storyline followed the children and mothers of the Leaf Village as they defended their homes from a sumo wrestler assault. Here's the issue, however: This humorous sumo attack happens during one of the final key conflicts in all of Naruto, the Fourth Shinobi World War. While the show's main characters are off risking their lives fighting the series' primary antagonists, fans were subjected to watch a group of stereotypical housewives rebuff a gang of fat guys with frying pans.
"Let me remind you," wrote one Redditor. "There was a war with who knows how many battles going on at the time, including the fight between Kakashi and the Seven swordmen happened entirely off-screen, and this was the filler they came up with."
Needless to say, it's disappointing for fans to build themselves up for the show's final arc only to have those events delayed for such a ridiculous story. In many ways, The Allied Mom Force!! might not even be Naruto's most ridiculous filler. It just came at the worst possible time and broke the suspense created by one of the series' most important events.
