When I rewatched The Dark World last night as part of my pre-Endgame binge, I was impressed with the thought there is a good movie in there somewhere trying to get out. It is just run off the rails by the single worst story and most underdeveloped villian in the MCU. There are great character moments, particularly with Loki. It is one of the more beautifully shot MCU films and has a great score. When a film you are barely interested in can have a funeral scene for a character you barely know, but the cinematography and score can get you to shed a tear anyway, it underscores the quality of those aspects.
It's one of my least favorite MCU films, but I'd be curious if there is a way to re-cut it and improve it, since there is potential there.