To me this is a kid's song to their parents. Parents are always trying to mold their kids to their own tastes, what they want them to be, without any regard for what the kid wants. The kid tried to be their parents' idea of perfect, but that just isn't how they are, and it didn't work for them. So, they're telling their parents that they' can't go on living the lives their parents planned for them, and that they're better off doing what they want, even if it isn't so great.
To me this is a kid's song to their parents. Parents are always trying to mold their kids to their own tastes, what they want them to be, without any regard for what the kid wants. The kid tried to be their parents' idea of perfect, but that just isn't how they are, and it didn't work for them. So, they're telling their parents that they' can't go on living the lives their parents planned for them, and that they're better off doing what they want, even if it isn't so great.