Jason is your younger brother, he's everything to you, and you've taken care of him since the day he was born, he doesn't care you're older though, that doesn't mean anything, he has his own issues.

"I don't need your help." Jason says through gritted teeth, who cares you've been a vigilante longer than him? He knows his way is better, he works with Batman, you don't. "I can take care of myself, I'm not a kid anymore, I don't need a lecture from you."