I agree with Tom. It’s OK to be angry. Jesus was angry when He saw those in the temple buying and selling doves and treating it like a market place.

But we are told in Ephesians 4:26

“In your anger do not sin”: Do not let the sun go down while you are still angry

So The important thing is how we respond to the anger. Making sure we respond in a way that is honouring to God, and getting our emotions under control is key.