Different strokes for different folks! I've been fortunate enough that many of my family and friends have been happy enough to follow me.
But I don't disagree with you, Signal has a much more recognisable brand and better user experience. These are things that we need to improve if we're going to get anywhere near the level of adoption Signal has.
I originally suggested Monal to my friend (who is quite into iOS and really appreciates a well designed application) and she found the same, but then she tried Siskin, and was happy enough to use it to this day.
As a note of caution, I used Oracle's free tier to run a personal Matrix server, and it got deleted without any advance warning after a few months. I migrated to another provider and haven't had any issues for 2+ years now.
Along similar lines, I'd say Snikket. I feel XMPP often has quite a bad reputation based on the user experience from 10 years ago, but it's come such a long way and projects like Snikket make it very easy to get started.
Different strokes for different folks! I've been fortunate enough that many of my family and friends have been happy enough to follow me.
But I don't disagree with you, Signal has a much more recognisable brand and better user experience. These are things that we need to improve if we're going to get anywhere near the level of adoption Signal has.