Perhaps the best example of this is featured in Alan Taylor’s Thor: The Dark World, as Christopher Eccleston’s Malekith never manages to get interesting, and it’s a shame because the entire plot is dictated by his actions.
If Marvel Studios has had any one consistent issue with their films, it’s that the villains for the most part have been small-time and forgettable.
The movie definitely has one of the best spectacle-driven third acts in the MCU, but the movie still can’t really be called one of Marvel’s best, and to date it’s really the franchise’s worst.