What has changed the equation for the continent started in the 2000s, the commodities boom along with telecommunications improvement, along with the entrant of new players such as China, India, Turkey, and until recently Brazil(in the Lusophone states).
So if we choose to look at those historical datapoints, without even getting into abuses at the IMF/World bank, we can effectively agree that the Bretton Woods sisters have done very little to move the needle on African prosperity.
Can anyone blame Africans for ignoring the World Bank and IMF when the countries that did ignore its orthodoxy, from China in the late 1970s to then India in the early 1990s, prospered?