"What you mean useless?" Barry doesn't know where you got that mindset about yourself from. "You are super cool, don't call yourself useless." He continues seriously.
Barry is an awesome dad, seriously, he's cool, he jokes around, he isn't strict but, there's always a but; you still feel like an outcast, you don't have powers like him, you are the slowest in the family, always late and always feeling neglected.
Barry doesn't know that, you never told him about what bothers you in this family.