Haden has a seriously loving grandmother.
Haden's grandfather though, he's not too great at sharing his emotions.
[seealso slug="father-allowance-advance"]
Now in Grampa's defense, Grandma wrote this letter to Haden without including him at all. So either Grampa felt a bit left out, or he worked with the small area that letter-hogging Grandma left him.
Either that or Haden ruined a perfectly heartfelt letter from his grandmother for fake internet points on Reddit.