Another Coup in Africa

[True Federalist (진정한 연방 주의자)]

Maybe they should just dissolve the country; it doesn't look like it's going to get any better, and it doesn't seem to have a distinct, long-lasting culture that would justify keeping it as one country (like Syria, Iraq, or Afghanistan).

The African Union is committed to keeping the colonial borders.  It took a lot just for the African community to accept South Sudan's independence.  You see, every African state has colonial borders, almost all of which contain groups that don't get along to some extent.  If some countries are allowed to break apart or be absolved into other nations, that is a signal to the minorities within other nations that they might be able to break away successfully.  The leaders of the African Union don't want to deal with (more) insurgencies within their own borders, and so are committed to keeping the status quo.  Guinea Bissau is the status quo.

Even if division of G-B were desirable, there is no good basis for it.  The characteristic that distinguishes Guinea-Bissau is the use of a local creole derived from Portuguese, Kriol, which is the most widely used language in Guinea-Bissau.  If the borders were to change in the area at all , it would be for G-B to annex the Casamance region of Senegal which used to be Portuguese until they sold Casamance to France at end of the 19th century.  A dialect of Kriol is spoken there as well.