I have noticed through my life that whenever I blamed somebody (or something) else for a misfortune, it was me, I, myself, that experienced even more stress, not the perpetrator of the wrong-doing to whom I was directing blame.
To forgive one has to be willing and willingness cannot be forced. One can only review the “traumatic event” with an intention to forgive all parties involved, whether it be somebody else, oneself or circumstance.