Challenge!Bullying Robs people of Dignity

It's difficult to understand why anyone would want to make another feel worthless. It can happen in a myriad of ways:
Telling someone they’re stupid
Being critical of someone’s work publicly
Being impatient and doing someone’s work for them
Domestic violence
Putdowns
I’d like to put out a challenge and ask people to add to this list.
What has made you feel worthless at some point in your life?