A great way to look at it is that a person has control over the present but not the future. While you are justified in being upset about the act you shouldn’t be thinking about how if not for this person everything would have been better.
We find this in Rav Saadia Gaon’s Emunos Vedei’os. The Ohr Hachaim Hakadosh separates the two (????? ?? ??? ????).