I somewhat understand the hate for electron but as a non-Mac user I'd much rather have access to this app - and I suspect the author would rather have me pay them for it. For such niche software it seems silly to build it so platform specific.
To get that kind of native feel in an electron app is either impossible or going to take a lot more work than just using native SDK's. There's a reason people hate on electron, because it's a bloated alternative that merely comes close to having a native feel.