It is very difficult to create a good scary movie. This movie has good scares. It is very difficult to create good scary movie with a good ending. This movie had a convincing ending. But the director had to fix what was not broken and created a mess.
If you get to the point where the original author of the evil cartoons are revealed, stop. Do not watch the movie further. The story is perfect.
One reason for the plot twist in the end was to probably to create a sequel. But a sequel is not possible after two cops are dead. The illustrator's location is found by triangulation of the mobile phone. Well, that ties in the her location with the murder. Only murders that could be committed in a sequel would have to be within prison walls.
If you get to the point where the original author of the evil cartoons are revealed, stop. Do not watch the movie further. The story is perfect.
One reason for the plot twist in the end was to probably to create a sequel. But a sequel is not possible after two cops are dead. The illustrator's location is found by triangulation of the mobile phone. Well, that ties in the her location with the murder. Only murders that could be committed in a sequel would have to be within prison walls.