Seeing such issues with Matrix and other open, common-good projects, I get the feeling like they just aren’t architected for good everyday-user UX.

Matrix is making real efforts to change this with Matrix 2.0, but still seems to suffer from design debt in many places.

I think this is partially due to the people they attract who largely work on the projects for free: Tinkerers who care about some form of technical elegance for the fun of it. I’ve had a few conversations around FOSS, including Matrix, at this point, and a not-too-uncommon response to my relayed criticisms was “then the user is wrong”.

I can’t tell them what to do. I could tell them what to do if they want adoption by normal people, but many don’t seem to be interested in that and you really can’t argue with that.

If adoption by normal people is a project goal, you have to seriously engineer for that. As much (partially fair) criticism as Gnome gets, they managed to build a desktop package that can seriously be used by normal people in the real world.