Things I will never say to my son, daughter, child-in-law or grandchildren:

I wish you had never been born/I wish I had never had you.
I hate my children.
No, you're wrong, you don't feel like that.
You don't want to do anything the way you want to, so I'll go out my way to ensure you do things the way I want you to which is detrimental to your health.
You should make more of an effort with your father, he just isn't good at showing that he cares or even caring.