I logged into Telegram today to this update from Durov. It reads like a bunch of hogwash from someone who is hiding something. They are eyeing investor funding soon, right? (EDIT: eyeing an IPO https://www.techopedia.com/news/telegram-eyes-ipo-as-it-aims-to-become-profitable-in-2025) A lot of things seem to be coinciding with him slinging mud about his competitors.
This is how all capitalist markets progress, which is why I get annoyed when folks try to talk about this as though it is hypocritical. There is nothing hypocritical about a capitalist attempting to stifle innovation and competition for the advancement of their own personal wealth. This is what capitalism is about.