my painting of the teacher's pet

so i did this big ole portrait of our super strict art teacher cuz she gave me detention like twice a week for breathing wrong in class. it was kinda mean but also funny and honest, you know? i painted her as a tiny little puppy dog wearing one of those dunce caps with the cone on top. its so ridiculous looking that everyone laughs when they see it. my question is, am i just being petty or is it actually good art? what do yall think about taking revenge like this in school?