Perhaps you should focus on what you would enjoy being challenged by, rather than what is easiest. The easy stuff get automated or abstracted away, so software development will always be challenging and require learning new things.
I changed from frontend to backend since I did not enjoy browser bugs and fighting to get a page to look the same in different browsers. Backend had different challenges (like integrating with legacy systems), but challenges I enjoyed more.
> I'm not good at animations, responsive layouts, pixel perfection, es6
If you are not good at something, then you have to study and practice to get good. This will be the same with backend. All these things are learnable. You have to enjoy learning to be developer.
I changed from frontend to backend since I did not enjoy browser bugs and fighting to get a page to look the same in different browsers. Backend had different challenges (like integrating with legacy systems), but challenges I enjoyed more.
> I'm not good at animations, responsive layouts, pixel perfection, es6
If you are not good at something, then you have to study and practice to get good. This will be the same with backend. All these things are learnable. You have to enjoy learning to be developer.