Yes, it's built with Electron. But I don't think there's anything wrong with the framework. Plenty of amazing apps are built with Electron, and they're fast and snappy. Without Electron, we'd never be able to bring WebCatalog to all major desktop platforms.
People use electron because it's literally the only option in many cases.
Can you point to a viable alternative? Multiplatform by default, with the option to build rich reactive UI? Plus text editing with a sane document model (via ProseMirror etc)? Fast math rendering (via katex)?
If so I will happily jump ship! Even Microsoft's attempt at a react native for desktop excludes Linux so it's a non-starter. The Rust community seems to be interested in solving this problem, and I eagerly await their solution.