I cracked my brothers semi-cracked tablet he got for christmas over a year ago
Why did you crack the tablet?
I did so to get back at him for insulting me.
You should not break other peoples property. If you had a problem with him insulting you, you should go to him directly and tell him.
I know but he said some stupid stuff about me and I took it to heart.
I can understand why that would upset you but by breaking his things, you could be punished. It would be better to talk about it instead when you have a conflict.