Telegram is just actually superior in terms of features I don’t get it.
Messaging apps are tricky, you can’t just pick what’s the “best” because it’s primary function is to message people, so the best app is what can do that.
If nobody you want to message uses telegram, or signal, or matrix, than they aren’t very good messaging apps FOR YOU.
You have to start using the app, then start convincing everyone else to use it, and that’s quite a hurdle, when most people you know use the “good enough” Whatsapp, or even just SMS, or iMessage.