I'm sorry I didn't realize you didn't give a damn about me.
I'm sorry I'm not as perfect as you expected me to be.
Eli Whitney created interchangeable parts back in the 1800s, but humans aren't machine made.
I can't read minds, and I don't know what you want unless you tell me - not that I'm always able to bend to your will anyway.
You don't know how much pain you cause me, but when I try to tell you, you're defensive, harsh.
I know now that you don't give a damn about me.
Please just leave me alone.