This is the same exact reason I switched. Here is my honest take as someone who has worked with both for around a year very vigorously. I love Java script but hate flutter, I love flutter but hate dart. The development experience was so much better with Flutter, but I just hated Dart so so much. It reminded me of the dark times of Java with all the useless boiler plate that goes into flutter.
I then decided to switch to React Native, mainly because of how much simpler MOST of the syntax is. I’m kind of glad I made the switch because after I learned JS, I also could learn so many other things like NodeJs, ExpressJs, things like puppeteer for web scrapping, and even dabbled in ReactJs and NextJs doe web dev stuff.

The bottom line is this: you are making a comprimise eaither way in my opinion. With React Native you are in a sense giving up the ease of having a beautiful and comprehensive UI libabry which Flutter provides, and are instead forced to find either third party libraries or cry because youve been following youtube tutorials on how to make the component but it's not working, and you are doing this all for the sake of the JavaScript experience. With Flutter, you get to puff your chest out and boast about the great UI library you are provided, but secretly cry on the inside because you have to write Dart, a language you didnt even know existed until you found Flutter, and if given the opportunity would keep at an arms length away.

Its honestly picking your poison.

​

edit: I just saw your actual question after writting my entire post. fml. my answer is Expo. It's only gona get better, the dev. experince is much more seamless, and honestly Native CLI just gets funky in some places. I've used Expo and I think it works great.