Telegram was launched 8 years ago. By a Russian billionaire.
Facebook/WhatsApp/Instagram have ~3 billion users and Telegram only has 500 million, after FB has been under constant attack for about 3 years and Telegram has received a ton of free advertising as a result.
If you call that easy (after all, that what the comment you were replying to was asking), then everything in this life is easy. Heck, getting resurrected is probably "easy".