First of all, there is no such thing as an average user. Also, it is not relevant to the discussion. I care about what I want in a system, not what some imaginary users want.
Now, we could stop there but I will play: Electron solves a real problem for developers. Writing cross-platform GUI apps is a real pain. Yes, there are native solution but ensuring the user has the exact same experience on every platform tends to be orders of magnitude more costly compare to web based solutions. (That or they are exotic options like Lazarus with Free Pascal that have a much lower Developer pool.) Many apps wouldn't even have Linux ports if they were not written on Electron.
Now, why do users accept them? Why are they not out-competed by native solution? Oh, honey. Why do I have Microsoft Teams installed? Because I like it? Hell, no! Because I need it for work. Why do I have the Discord Client? Because it is great? Nah, I long for good old IRC but Discord it there the people currently are. Did I think the Epic Games launcher is such an great app? Nah, they bought me with offering free games.
Users tolerate shitty software for many reasons, mostly because they have to. It does not follow from that, that they don't mind software being shitty.
In which case I hope you are prepared for software to get many times worse, because the software industry doesn't give a tuppeny fuck what you want in a system, they care what sells to the lowest common denominator. And that means slow, bloated electron web sites shoehorned into the desktop because the pool of mediocre JavaScript developers that can extrude a minimum viable product is huge compared to the pool of native developers of any language.
And it will continue this way for as long as it's accepted. So, forever basically, because the average user you claim doesn't exist will put up with anything placed in front of them without significant enough complaint to impact profits.
