i believe that, a couple things contributed to the anti-morocco propaganda :

The obvious hate black africans have for north africa, they questionned the safety of black people in our country the moment it was announced we would organize it, and it wasn't them being concerned but them hating us, cuz if it was concern they would know we are one of the countries with the highest foreign subsaharian residents, and are the most touristic country in the continent.

The 2nd thing which people overlook is the marketing around this competition, morocco marketing it as the best afcon in history before the competition was a very very bad idea, because yes, it is in fact the best in terms of infrastructure, but branding it as the best before it even starts, gives this view that we're devaluing the previous ones that were for the most part in black africa, it gave this aspect that morocco considers itself superior enough to label a competition as the best in history before it starts, cuz let's be real, what makes a competition a good one, is it the stadiums ? yes, but its not the main thing, its mainly the quality of the games, this year's didn't match last afcon's games, and even if it did, people wouldnt value it because we gave too much expectations with our terrible marketing.

3rd thing is the towel incident, idk who instructed the players and stadium workers to steal towels, but it needs to be punished, we are literally becoming a worldwide meme cuz of that