It's pretty much impossible to not use Messenger these days. I stopped using Facebook, but I can't just quit Messenger unfortunately.
Is it no longer possible to reach people via text or phone?
Coincidentally, my social circle is approximately 0. It has never previously occured to me that this may not actually be a coincidence.
I have a clean, libre LineageOS setup on my phone, except for whatsapp.
My family has entirely moved over to Telegram, though I think they also still use WhatsApp. It doesn't bother me - change starts with yourself.