I have [self-diagnosed] Code Style OCD. Like you, the Flutter nesting levels was a major fear entering the space. It feels both ugly and inelegant.

I found i was over this fear in days if not hours, and continued to improve with my ongoing discovery of helpful UI components. Furthermore, defining your own components and breaking out inline functions into proper functions in your UI classes goes a long way, too.

Android Studio, if you use it (i didn't), auto-appends closing bracket comments to keep you visually aware of your nesting. For the reasons i stated, i don't think it is as important as you might think.

If you haven't tried Flutter, particularly for syntactical reasons, i would urge you dip your toes in.