These 15 are easily a lot worse then Sausage Party and that list doesn't even feature any direct to video garbage like Kindergaden Cop 2.

http://www.metacritic.com/pictures/worst-movies-of-2016?ref=hp

Well you didn't see any really bad movies then I'm pretty sure you didn't come close to seeing any of the 15 movies in that metascore list of of worst movies of 2016.  People usually don't seek out bad movies or bad tv shows even though I watched most of the episodes of one the worst TV shows of 2016 Uncle Buck since nothing else better was on during that time and a bad sitcom without laugh tracks is still better then a halfway decent sitcom with laugh tracks.

I really doubt your list holds anymore more weight than mine or any others user in this site. There were worst movies, Gods of Egypt, Assassin's Creed, Nine Lives? Those are awful, objectively. Granted, you might be the type of people who don't enjoy mindless, raunchy, toilet humor that Seth Rogen movies usually bring and that's fine, but Sausage Party knew what it was and it played to its strenghts.

OT: IN 3D? WHY? how would that even enhance a movie like this? Christ.

Suprisingly Assisin's Creed didn't make the metascore list of 15 worse movies of 2016.  Don't know how it ended up with a 36 meatscore it should have been at least 10 points lower.