> Every black-majority country is like this…incompetence and corruption takes over.
I don't think that's true. For instance, São Tomé and Príncipe is well run by all accounts I've read. I'm sure there are others, that's just one that comes to mind right now.
It's a small archipelago nation with a tiny workforce and few natural resources, so they're more or less destined to be poor. I don't think that reflects poorly on the quality of their governance though.
They've had a functional multi-party democracy for decades (a few small failed coups, but with numerous peaceful transitions of power between parties and no civil wars.) Their primary education system is pretty good and literacy rates are high. Perception of corruption is average and trending down. They rate well for free speech, political and economic freedom.
I don't think that's true. For instance, São Tomé and Príncipe is well run by all accounts I've read. I'm sure there are others, that's just one that comes to mind right now.