I always just tell them "life's not fair. The sooner you understand that, the easier life is going to be for you."My DD (11) does not cry when she strikes out swinging, or makes an error, but...call her out on a pitch above her head, or out when she was safe by two steps, or a missed tag...waterworks.
We’re addressing it, but it’s a tough one with her.
That bounces right off of 9 year olds, BTW.