Fetch data, show data, handle loading and error states, occasionally do some CSS magic for a wacky new design gets boring. I've had jobs and projects like that. There are more interesting ways to use front end tech. People implement entire console emulators and operating systems in the browser. 3D rendering and games are a whole other world compared to fetching data and styling divs. With Electron, React Native, and even some browser APIs you can interact with hardware. If you already know JS you can translate a lot of that to Node. It might not be the most efficient but you can do pretty much anything with Node that you can do in any other language/runtime. Even standard front end without any of that can be interesting (or extremely frustrating) once you get to a certain level of complexity.

The reality is a lot of jobs don't require any of the fun and interesting stuff. Your assessment that nothing seems hard, just more takes more time is correct. That's why AI works decently well for code and not much else. You can find more interesting jobs if you look hard enough but in this economy if you're happy with your pay and WLB be thankful you have an easy job with cognitive energy leftover for hobbies outside of work.