Dystopian only in the mind of a sci-fi fan. In practice it's a free communication service that helped millions to connect. No one forced people to use WhatsApp like something from 1984, people chose it from the various alternatives.
In fact, a lot of people prefer Telegram, and a lot use neither, preferring good old cellphone conversations. Oh wait, isn't that a closed protocol that dominates all offline communications? How dystopian...