My wife and a few family members use telegram, it’s perfectly fine for using as just a regular chat app, you can join spam or sketchy groups but if you don’t join premium or enable contact access, and generally be smart about using it, etc you will be fine.
My entire extended family only has iPhones and my wife and I are the only ones with android, gotten a lot of them on telegram to be able to have large group chats working well for everyone to have a good experience.
I also just tested on windows with Strict privacy set and the 3 addons mentioned and I got my browser has “strong protection against web tracking” and unique fingerprint output.
Not trying to say you’re wrong or anything just playing devils advocate and sharing what I’m seeing.
My wife and a few family members use telegram, it’s perfectly fine for using as just a regular chat app, you can join spam or sketchy groups but if you don’t join premium or enable contact access, and generally be smart about using it, etc you will be fine.