Ugh. Just terrible.
http://www.ranker.com/list/the-worst-horror-movie-sequels/dee123,
American Psycho 2
Blade: Trinity
Book of Shadows: Blair Witch 2
Exorcist II: The Heretic
Halloween Resurrection
Jaws: The Revenge
King Kong Lives
Return of the Living Dead: Rave from the Grave
The Rage: Carrie 2
The Ring Two