While I think Arabic is one of the difficult languages, it's not for the reasons outlined in the graphic.
I'd say it's difficult because the grammar is difficult, there are lots of plurals and verb forms and some are irregular and they have to match. It has sounds a lot of other languages don't have and it has lots of different dialects that all use the same written form.
True, Also reading and writing in Arabic is like different things. You can say something but you will write it differently, especially in Egypt, Not every word applies to this of course there are many similarities .