I thought of something that hurt me

This idea Judai has that duel are supposed to be fun and he is set to be having fun…It is almost like an obsession and sometimes it didn’t made much sense but then I realized : when he was a little kid, if he got upset dueling then Yubel would hurt his friends.

What if that his obsession in having fun is a leftover defense mechanism of back then? If he is having fun, everything would be alright and Yubel wouldn’t hurt anybody?