Or at least, they're not worth the hype they're given. The wheel is constantly turning, and the hot new framework of today is just a re-hash of something already done years ago with a pretty facade.
You probably learned the actual fundamentals of the web, which is exactly what a good developer should do. Nowadays "frontend devs" don't know how to make the most basic functionality without React, Bootstrap, and 99 other pieces of bloat.
Frankly the stuff I look at just disgusts me on a fundamental level. Like as soon as you decide to use React, you've just mandated up to several megabytes of JavaScript simply to render your HTML. That's abhorrent.
You definitely don't need a framework and you might actually be able to avoid using JavaScript altogether. I use jQuery only because I like the elegant/terse syntax and I struggle to think of any type of "ordinary" website where you'd need anything else.
If you approach frontend like "I need to use React/Angular" then yeah, you're gonna bash your head against a wall, because it's an entire new ecosystem and paradigm to learn.
I dont see how a single line of js can remove the need for front end design, complexities of scaling, theme choices, and user friendly design patterns with interactivity.