The UX in Matrix is really crappy. I say this as someone who has been on IRC since the late 90's. I can deal with jank. I was in the IRC wars. I've seen server splits used to take over channels by Polish IRC warriors.

Matrix is its own brand of confusing because it's trying SO hard not to be a Discord clone. If you properly want to own your Matrix channels, you need to run your own server and that's not a 3 minute thing to do.