I think this is more of a documentation issue. Redux itself is simple, it's just the barrage of functions you need to use to get anything going that get in the way IMHO. A little layer on top would make it pretty nice in that sense.

Redux effects and friends are simple too but suffer the same issue, they're so functional that they can be hard to reason about. You really need higher level abstractions to hide that stuff or it gets unwieldy fast.

I think it's the typical 80/20 – hard things are easy with React/Redux, easy things are sometimes hard.