Just my thoughts, but when I suggested moving a certain group from WA to TG, one of the members had very strong words to say against it. I pm'd him, not even know who he was, for clarification, and he told me that TG is one of the biggest problems around. With bots that can retrieve almost anything and everything (and since it's all stored on the cloud, the device can present clean, and then anything can be loaded). I can see the validity of those claims (I was previously unaware of the existence of TG bots) and can understand and appreciate why the spread of TG use might need to be curbed.
He also claimed that it's used for illicit transactions. I don't really understand how, but he claimed that it's one of the challenges of law enforcement in today's day and age.
I was the same way. It was my new life mission to move everyone over to Telegram, but due to it's abilities (i.e. features) it enabled otherwise kosher/filtered users to access things they were trying to protect themselves from, I stopped trying to get people to switch over. I don't even like discussing its issues(ignorance is bliss), but it's already been said here.
@jj1000 , there are MANY telegram clients. almost each platform (ios, android, windows, mac) has at least 2-3 clients.
https://telegram.org/apps (that's not all of them, at all)
You can PM me (or Telegram me), and I'll "show you around".