Damian and Jason had terrible childhoods
Dick and Tim had great childhoods before they started off as Robins. They both had loving parents at an early age, childhood friends, favorite dishes or TV shows…
Jason and Damian never had any of this. Sometimes, Damian catches Dick singing random, unknown songs, the songs that his mother sang to him before bedtime. Talia never sang to Damian. He didn’t had any friends growing up with whom he could play games, like Dick did with his friends at the circus.
Jason often goes to the kitchen and finds Tim eating some very weird comfort food, something his father would make him whenever he got sick. Jason’s parents never cooked anything for him, specially comfort food.
He didn’t even have a TV when he was little, so he didn’t knew any of the children shows Tim would nostalgically remember with Steph.
Alfred suspects that’s why Bruce’s relationship with Dick and Tim is usually easier than with Jason or Damian. While the first two see their lives with Bruce as new and different from their old ones, Jason and Damian see it as new and better. Bruce is not emotionally capable of handling this kind of responsibility, and freaks out sometimes.