For me it was too many unverified accounts pretending to be the real thing and too much mass selling. Somebody sells something and 100 people repost it. As far as I’m concerned, too much fake news by bogus accounts. I don’t know if it’s any worse that other DS controlled media but IMO, it’s not a safe place for conservatives. There are safer places to get conservative news.
Don’t even think about putting the app on your phone or tablet. It eats up all of your memory and free space in a flash. If you use it, use it on a computer.
It isn’t hard to delete Telegram once I quit entering the wrong number. Here is a link if you prefer to see step by step info. My account is deleted, finally!
https://www.makeuseof.com/tag/deactivate-delete-telegram-account/