There are legitimate technical grievances with Electron, but how many time must those be expressed? If we data mined every Hacker News comment for negative comments about Electron would it be considered big data? I just don't think the persistent Electron criticism for each and every Electron app is very productive.
As other commenters have expressed. If someone could provide an example of an alternative to Electron that provided the same affordances (multi-platform, open source, permissive license, proper web view support), then by all means.
Not everyone is Spotify and can invest the technical know how to make things with Chromium Embedded Framework. To this day the Linux client for Spotify is not an officially supported client. It is something the Spotify developers maintain of their own volition.
And QT, a popular window toolkit, is quite expensive unless you release your software under GPL (at which point you can use QT for free under the GPL license).
Also, a single maintainer does not have time to work on three or more window toolkits for their app (Windows Forms, Cocoa, and GTK).