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.
The fact that Bar-Kooda eats his victims is pretty scary, though that's nothing compared to seeing his dead, naked body all carved up on Gorga the Hutt's dinner table, quite possibly the darkest bit of imagery in anything Star Wars related.
The half-eaten remains of Orko, though not to the extent of the example above (probably because Bar-Kooda looked almost human, except for his head).
Bar-Dooda's crew being sucked into the vacuum of space is portrayed very horrifically.