If you want to use end-to-end encryption in Telegram, you must manually activate an optional end-to-end encryption feature called “Secret Chats” for every single private conversation you want to have. I believed that Telegram was busy growing their network and that, in time, they would improve the quality and usability of the platform’s end-to-end encryption: for example, by activating it as a default, providing support for group chats, and making it possible to start encrypted chats with offline users. Instead of improving the usability of Telegram’s end-to-end encryption, the owners of Telegram have more or less kept their encryption UX unchanged since 2016.