I found quite the opposite, it's much easier to manage many activities, I am guessing you were using your own 'routing'? Take a look at react-navigation or react-router (it supports react-native too)
I was looking for libraries that use native code but react-native-navigation was too opinionated and Air BnB's solution wasn't and isn't production ready.
I pretty much put the project down after that and started learning Swift (I already do Android).
Now I decided to go all out on iOS dev with the hope of making a career change from web.
