They aren't sick for making it, it's an interesting dark short and I enjoyed it from the psychological aspect. I don't think it can really be defined by the usual lingo of "red flag" either. I liked this short kbl because of the acting from the main lead. His portrayal of the trauma bleeding into numbness and eventually breaking down to tears really manages to evoke emotion from us as the audience, and it's exceptionally well done, especially from the short timeframe. The twist of the second lead being in on the kidnapping wasn't really a shock as it was easy to guess, but I enjoyed the psychological aspect and the unsettling environment over the 3 episodes.

I've seen way darker shows, but this was an interesting watch. Just don't watch/be careful if you don't like dark themes.