I consider myself pretty good, too, but had to take a community college class to force myself to spend the time to learn website dev. It's an abortion. HTML/DOM/CSS + JavaScript? Back End / Front End? You simply must use a framework to do anything real. In class, we developed without frameworks, to see how the guts work. Like real guts, Web guts are ugly (although perhaps utilitarian) and not especially streamlined for their job; but given they evolved from simpler times, maybe pasting over the cruft with more cruft is our only salvation today.

I normally do embedded, and, to me, the Web Browser is just an app. Anybody could write an app that accepts text as input and output formatted text, graphics, pictures. It certainly could be optimized for within-the-app apps. I'm not sure why this hasn't been yet done. JSLinux is a proof-of-concept: https://bellard.org/jslinux/