The article is incredibly patronizing, while being also incredibly stupid. If the orcs were half as smart as would be needed to extract metadata from (poorly) encrypted traffic, they would just sidestep that altogether by adding a second device to the Ihor's Telegram account. That would have given them plaintext.

This low-tech "attack" would also work even better with WhatsApp and Signal (better because in Telegram secret chats don't get shared between multiple devices while in WhatsApp and Signal they obviously are - cause every chat is encrypted).