I played this single player, so didn't get to experience the glorious mayham of pvp, but taking on the bots was super fun :D Personally I find that the bots felt good to play against because the high degree of randomness doesn't make it feel unfair or too easy.
I'm wracking my brain trying to offer some kind of useful feedback but I think in its current state the game is already very polished and fun to play. I guess you could add to the mayham with different properties on the ball, like sometimes it's very heavy like a bowling ball, and other times it's super bouncy like a basketball. Or even add properties to the ground itslef, like make it slippery like ice, bouncy so the ball and fingers bounce everywhere or sandy for the opposite effect. Or even have bumpers on the sides of the pitch that bounce the fingers away if they hit them.
For a little more predictability maybe you could tweak the finger movement to vear towards the ball at all times in some way, or if the ball is within a certain distance. It might let the players feel like they have a bit more agency this way, but maybe this would also take away from the random mayham aspect of the game haha.
Anyway, really cool work so far! I'll be interested to see where you take it :D