Tbh I'm kind of amused that you rail against WhatsApp and then went and installed Telegram rather than Signal.
Telegram is a much better option that does not sell your user data and still has the best privacy options. Where most people like to disagree is the security part, but E2EE is not as important to me as long as my privacy is respected.
Signal is horrible to use and inconvenient for most people but with e2ee.