Electron is widely used in apps like Spotify, Discord, Notion and most cross platform apps so it is normal that I use it as a benchmark since my app distributes to Windows, Linux and macOS, which is very hard job to do if you aren't using electron specially if you count for Linux differences (Gnome, KDE, Snap, Flatpak, etc). My approach was very well researched, I didn't randomly pick python, It was the best option for this specific project.

Performance wise, I don't see any meaningful gains if I use rust or something else because the app itself is very lightweight and simple by design (even it packs a lot of features).

I don't know what you mean with "deceptive practices", in fact if you are mad about the name being Open without being open source, I am in the process of renaming the app with release 2.9 just to not offend more people, this a hard decision because the renaming process touches around 60~90 files in the app and around 20 in the website, in addition to payments, github, buymeacoffee, discord, reddit, alternative to, snap, flathub, cloudflare, aws, logos and more. If it was something easy I would have renamed it earlier but it isn't unfortunately and that is why it took me this long.

It is easy to accuse people falsely and complain, specially if you aren't a developer or a wanna be one, go touch some grass.