My brother raging

This morning my little brother (M12) kept screaming on his game and smashing his hands on his desk and this had been going on for a while. I (F17) told him not to keep getting angry on his games and he looked me in the eyes and yelled at me to shut up. Now I know this can be a part of growing up but the thing is, me and my brother are close since we have had a lot of family struggles and I always try to support him and I know he’s a good kid so that hurt. After that he turned around and I pointed my finger at him and said “after what we’ve seen growing up, if you turn into an angry man I will never forgive you” and I teared up a bit so I went to the bathroom to calm down. He’s just a kid and I don’t know if I should have said something so hard-hitting, he’s been quiet ever since. I just remember the look of realisation he had and I feel really bad. Im wondering what I should do going forward.