I don’t think you need ACF for this I built something similar to show if a post was helpful or not. Basically you add post meta to a post, by adding or removing instances of 1.
If someone likes the post he clicks the button and the counter will go up by one. If someone doesn’t like it the reverse will happen.
This is stored in post meta so no need for ACF. And you can easily use this meta to sort the posts with.
You need 1 form with 2 options.
option + = update post meta with +1
option – = update post meta with -1
