Being someone familiare with the matter both inside and outside of Iran (and understanding the harshness of the situation as you mentioned), its is not easy to justify Taskulu as one of the most successful startups unless you expand the scope of "most successful" to 50!
Also, as general rules of journalism dictate, having only one perspective (and here only one company to be more specific!) to talk about is not an in depth analysis of the subject as indicated in my first comment.
I would rather see this story with a less deceiving title to promote a good Iranian startup like Taskulu.