Replying to I just got in trouble

so today i was in drawing clas an i was bored so i was supposed to draw thes three kids in a line. so anyways, i drew the first one all weird and made a speech bubble coming off of him that said im retarded. then i finished my drawing earlier so i drew a stick figure with a chainsaw and an arrow that said the invisible man. then i drew the fabulous four in bubble letters. so time was finally up. like who cares about what i did. well i put my drawing up for display and the teacher flipped a shit. he got all offended and said i wasn't trying at all. did i do anything wrong?