Ideas that should have been easy hits, but were absolutely fumbled forone reason or another

At the end of Dannganronpa 2, it was revealed that the characters you've been getting to know while playing the game were actually evil, working under the series' big bad Junko, except during the events of the game they had their memories erased. This was a pretty shocking reveal, but still fairly believable since Junko has been stated to be a master manipulator.

Eventually a new anime was announced, titled Danganronpa 3. Among other things, it promised to flesh out the backstories of the DR2 cast. This was of course pretty exciting. People were expecting an incredibly tragic story, where these lovable characters are slowly broken down and manipulated to commit awful acts.

And then the show came out. As it turns out, Junko did not use clever manipulation, and horrible tricks to make this cast do her bidding. She actually just found a random ass guy, who we have never heard of before, who accidentally made a movie so bad it made you want to kill yourself, and then he just showed that movie to them. That's it. These characters weren't actually morally complex in the slightest, they were just brainwashed into doing evil things. The themes in DR2 that people could always choose to improve, even if they did unforgivable things in the past? Forget about those, they actually have done nothing wrong ever.

The best part is that this choice isn't even my least favorite part of the show, this is just the easiest to complain about.