I just read the quoted headline, but it's not about quotas but EU based multinationals extending their business / exporting milk powder to Africa, tripling exports in 10 years (2006 - 2016) and competing with local farmers to the point they are put out of business. Not sure how the EU fits in there, other than that they provide an economic and legislative climate that allows milk prices to go low enough to make such a business viable.
I don't think it's related to the EU as institution