[Zenst]

https://www.bbc.co.uk/news/world-africa-46960532 is worth a read, there are few videos that I shall try to dig out that covers matters in far more depth

It also touched on here: https://www.youtube.com/watch?v=fiD24uEvY1U

Basically, the CFA got locked into the Euro currency when France joined it penalised African countries (former French colonies) into it as the CFA was pegged to the French Franc. This made those former colonies crippled by exports to anywhere apart from France who with the CFA setup that those African countries having to store 50% of their currency reserves with France at a 0.75% interest rate. Combined with the subsequent Euro pegging, that alone penalised those former African colonies with the CFA. Equally, they gained nothing from France joining the Euro and lots more pain.