Not surprising Newsweek's not a fan. BBG was probably the last sec-gen who dared to stand up to the USA. While it is true he also didn't achieve much as sec-gen, he did do some good stuff beforehand and after - he helped stop the Israeli-Egyptian war, helped push for more oil drilling during the 70s (wait, is that still considered a good thing these days?), and he did have a point in dealing with Africa, even if he made it horribly. Better than Ban-ki Moon, honestly - at least BBG kept the UN in the news, and tried to get the major powers to do things together. Nowadays, might as well not have a sec-gen for all the good the UN does.