11. Sif > Jane Foster
The movie's ill-advised romance between Thor (Chris Hemsworth) and Jane Foster (Natalie Portman) is pure narrative dead weight and just drags the entire production down, no question.
It's especially frustrating as there's a far more compelling love interest for Thor right in front of his face: Lady Sif (Jaimie Alexander). Hell, even Odin (Anthony Hopkins) basically points this out to Thor at the start of the movie, and from the few scenes Sif and Thor share together, it's clear their chemistry is way more natural and believable.
It sure didn't help that Portman basically only appeared in the movie at gunpoint anyway: she tried to bail after original director Patty Jenkins (who went on to direct Wonder Woman) left amid "scheduling conflicts", but contracts are contracts.
Sif's (arguably) hotter, tougher and she's got way more in common with Thor than Jane ever could, and yet the Asgardian spends the movie hung up on this puny human woman he's spent, like, a few days with? It just doesn't make sense.