The criticism is not just that he is successful but that he has tried to leverage, unfairly and perhaps illegally, Microsoft's near monopoly in desktop operating systems in ways that would let him dominate everything fromwordprocessing and spreadsheets to Web browsers and content.
The devices are derided sometimes for being limited in their reliance on apps, but those apps can allow a user to accomplish a myriad of tasks, from simple wordprocessing to completing business projects.
Never mind if nobody uses most of these new features (this article is being typed into word-processing software from 1997, for instance, but it seems to work perfectly well).
From a frustrating and fiddly experience, you're suddenly given a reasonably powerful word-processing machine with which you can happily create documents.