When it comes to crunch time they crumble
it's not necessarily what he could be doing it's just that neon doesn't let him do very much. stun's mediocre and easy to miss, there's no disadvantage to just swinging her wall and killing her mid-sprint, her sprint itself isn't even that fast and her slide gets pre-aimed all the time by pros, the only decent thing she has is her ult and even that's really inconsistent
if miniboo is doing well on neon (which he is) it's not because neon's good, it's because he's good. all i'm saying is just that he could be getting more value out of a different agent