I do think the criticism is productive, because it's usually not targeted against the developer or the app idea, but that it's built on the Electron framework. Maybe many developers using Electron do not have much experience and it seems like a good idea in their heads. In this case criticism is helpful because the developer will learn that Electron is bad and should be avoided.
A crude analogy: If I was driving on an divided highway in the wrong lane without knowing, I would be very grateful if the first car I met in the opposite lane would use the horn and blink the lights to get my attention so I could immediately stop and turn around.