At this point I'm just happy my family have tolerated it to the point we're not using Facebook Messenger, Google chat (it whatever it's called this month) and WhatsApp.
The xmpp or whatever other convoluted alternative you're about to recommend is not something I'm going to get 20 or 30 family and friends to switch to.
Signal is imperfect... But not as bad as many other options.
here we are talking about piracy, especially the topic of discussing piracy. Just use a forum, even something like lemmy. Here you have everything you need, but without contributing to a piece of shit like Moxie nor putting everything behind a walled garden like discord (or any other chat software for this matter)