What I immediately noticed looking at the README, is that the communication is centered around you and your values, rather than on the end-user:
You mention why you created it, not what it enables the user to do. You use Linux-lingo, like “free (speech and beer)” which many users are unfamiliar with and don’t know why they should care. Your installation instructions make it hard for users to pick which one they should choose. There are no Mac binaries, but Macs are wide-spread among developers. Windows binaries mention “x64”, which is very technical and might scare users away.
The Ubuntu screenshots make it look like “Linux only”. You could replace it with a Windows or Mac screenshot, to get people to understand it works on their platform.
You could still keep this technical (and potentially alienating) language in your documentation, but simplifying the README to make it easier for the 90% of your potential audience could make it more popular.
You mentioned in this thread that some people don’t want Electron. That’s true, and it’s a great USP for those that require it, but personally I would avoid assuming that it’s the USP that convinces the masses.