Doodles parents left him out. They didn't really have him as part of the family , they always left him somewhere, where the family group wasn't.
On Parents ( Simon Birch)
Doodle hadn't been exposed to the love that a child is supposed to experience. His parents weren't the most accepting to him. When it came down to his brother, he pushed Doodle to preform things a kid normally would. But his purposes weren't put of love.
Love ( Simon Birch)
Doodle wasn't expected to be much. He wasn't even expected to live very long. No one had thought of Doodle to be someone to do things. But his brother wasn't gonna accept that.
Expectations ( SImon Birch)
In Simon Birch, his parents didn't care about Simon at all. Simon had parents who were never really present in his life or tried to be in any way. They couldn't care less where he was or what happened to him.
Simon didn't receive love from his parents and even almost the whole town hadn't shown any sort of positive opinions about him. All except for Simon's best friend, Joe and his mother who loved him for exactly who and how he was.
From the very beginning, no one had expected anything from Simon. He wasn't even expected to live the first day he was in the hospital. He proved everybody wrong and didn't let anyone convince him that he didn't have a purpose. In the end, everyone realized how important he really was.