Sometimes it helps to feel bad for someone instead of being angry at them. I think of Gandalf’s quote from LOTR:

“Frodo: ‘It’s a pity Bilbo didn’t kill Gollum when he had the chance.’
Gandalf: 'Pity? It’s pity that stayed Bilbo’s hand. Many that live deserve death. Some that die deserve life. Can you give it to them, Frodo? Do not be too eager to deal out death in judgment.”