It's a side content that you don't even have to play. If you don't like it, it's fine. You can't please everyone.
Viewing post in Attack on Survey Corps [FREE VERSION] comments
Yep, I'm glad this nightmare was parallel content to the game's story. but I was surprised, because I expected something cool but it was completely cursed hahaha... anyway, now that I know what it is, I can warn others that I don't like this kind of thing to ignore it completely and avoid disappointment!
keep hard work dev, you need!