Yeah, it'd be easy to jab Beast Within, the movies, later IDW comics, or Energon, but what's the worst story arc? Rather it be cartoons, comics, the movies, etc. Hoist goes to Hollywood was a bit of an whack episode. One of the weakest spotlight episodes to me. G1 has alot of just uninteresting episodes. Some of the episodes in Transformers Animated, notably when their fighting the human characters, feel like rejected Ben 10 plot premises and characters. Prime had some filler episodes, like the clip shows, and the whole rivalry between Arcee and Airachnid, which wasn't even properly ended. Plus if you swap Tailgate out, nothing would change. Some of the IDW comics have filler moments. Like Infiltration was 3 issues (0-2#) of a nonstop chase consisting of Ratchet giving exposition dumps. Still a good series. The 2009 series was a little weak and RiD (and Optimus Prime) and MTMTE (And Lost Light) were hit or miss in terms of writing. The earlier 2019 run of Transformers was bad, due to exposition dumps and feeling like the writer was afraid people won't know what Transformers are. Which actually made me drop the comic.