Undeserved Misfortune

An Underserved Misfortune from a movie is End of Watch, when the cops Michael Peña and Jake Gyllenhaal are trying to do good in trying to get a gang that have killed people, but that gang traps them and starts shooting Michael Peña to death.

A situation from life was when I was younger, my sisters would tell me to go the liquor store to buy chips but I wouldn't want to go. Therefore, they told they were going to go but they weren't going to be me anything. The Underserved Misfortune is that if I go to liquor store I have to buy them something but if they go they don't buy me anything.
An idea for the film it can be that a guy does not treat his girlfriend well although she is a great talented innocent girl.