The ref missed the call. Your reaction is still on camera.

Two things are true at the same time, and only one of them is under your control. The call was wrong, and nothing you do in the next five seconds changes that. What those five seconds do decide is what the coach saw, what the other team saw, and what the kid on the sideline learns is normal. The injustice is theirs; the response gets filed under your name.

Have a default ready for the bad call, because deciding in the moment never works. Hands down, nothing said, straight back to position. Complain properly afterwards, to somebody who can act on it.