Please, please try Flutter. I had literally the same issues with React Native and gave Flutter a test run late last year. I will never go back. Flutter is so stable and honestly my frustrations with Flex made consider giving up on mobile development. I think as a backend dev i really struggle with the layout aspects of mobile dev and flutter makes it so easy for me.

I'd say spend two nights playing with flutter. It took me that long to feel comfortable with Flutter's version of Components and state, but now it's a breeze. Hot reloading works great, it's easy to plug in native code if you need it, it's just amazing. I haven't been this excited about a language in years.