Slavers

After watching a fuzzy copy of this film on the Fast32 streaming service, I gave "Slavers" just five points (still above the average rating). I'm wondering why, with it having so many plus ingredients: a strong cast (albeit some past their prime), excellent scenery, a reasonable plot, a good firefight - and I don't object to female nudity (with Britt Ekland briefly going topless, somewhat gratuitously, whereas the native women's near-nakedness was at least authentic).

Maybe it was the subject matter: the distasteful exploitation of Africans by Europeans, Arabs and their own countrymen. Since the film was made, there's been increasing concern about many countries' "colonial past" and perhaps it's today's zeitgeist that made me feel uncomfortable about that of the 1880s.