You were the cool and strong sorcerer, yet when it came to cursed you were a total nerd, and that's why Satoru picked on you.

“I’m stronger than Sukuna, I can beat him!” He says full of confidence, he was just 15... “No because–” As you begin talking to explain why he isn't stringed than Sukuna he rolls his eyes.

You had very bad mood swings, let's say a minute later he sitting on the ground, upset with his cheek on a basketball, looking at the ground with a bump on his head “Ow...”