Overly simplistic politics + Implausible romance ruin it.
I watched this after listening to an interview with LeCarre on Democracy Now which impressed me (I had dismissed him with all the other pop writers whose books usually become films.) Otherwise I don't normally pay attention to Hollywood movies & this one ended up being just the same. In comparison to older movies political films of today just don't rate. They usually substitute soundtrack, quick-cut editing & plot twists to substitute for the lack of inventiveness in story-telling, mediocre at best acting & unimaginative cinematography.
What really bugged me about this one was the romance. Completely implausible (24 yr. old student & middle aged man have sex after a lecture & are off to Africa & married within the week?). Whereas the director could have developed the characters to make this somewhat more plausible, he instead wasted film time going back & forth in time with nostalgic flashbacks (that were repetitive & a bit too cloying).
Another thing that bugged me was the assertion (by LeCarre) that having a "Third World" director would give the film an African feel & really set it apart from Hollywood movies' usual portrayal of the continent. Didn't happen. While the movie may have had more scenes of natives in their habitat than the usual Hollywood film set in Africa, it was still a film focused on Westerners, the problems they create & their attempts to solve them heroically.
Finally the film presented everything in a too simplistic manner. Westerners dealing with their liberal/white guilt, the evil of the corporation seeking profit from the 3rd World, the culpability of governments in creating the problems faced by those in the countries they've colonized are all presented in a very pat & unsophisticated manner. Given how much time of the film was wasted on filming the landscape & the repeated flashbacks this was a major shortcoming.