These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Nausea Fuel: Some sections are hard to get through, due to the intense combination of Eddie Campbell's artwork and Moore's disturbing subject matter. An entire chapter is devoted to a graphically detailed dissection of a corpse.
The chapter isn't called The Unfortunate Mr Druitt for nothing.
All of the prostitutes and victims are this. They are forced into their line of work because of abject poverty and are subject to rape, violence and can't turn to the church or the police for help because they are looked down upon as less than human. It says something that it took Jack the Ripper's killings to bring attention to their appalling living conditions and exploitation.
In the movie:
Adaptation Decay: The film's story was changed into a genuine mystery, rather than the comic where the Ripper's identity is known from the beginning. Naturally, making a mystery out of a story that wasn't intended to be one results in some weird plotting.