Maniac loved almost everything about his new life.
But everything did not love him back. (15.24-25)
He could see these things, but he couldn't see what they meant. He couldn't see that Mars Bar disliked him, maybe even hated him.
When you think about it, it's amazing all the stuff he didn't see." (16.6-7)
And some kids don't like a kid who is different.
Such as a kid who is allergic to pizza. (16.10-11)