I don't think what you said is bad. It's true that emotions can get in the way of playing well. If you think it wasn't well received, it probably had everything to do with the timing. "bad troubles at home" could mean a lot of things and blended (i.e. step) families can have complicated dynamics. Maybe you could try saying something like.."hey I hope you're not thinking of quitting the team. I know things are bad at home and you don't want to talk about it. I just want you to know I'm here for you, you can trust me."