How do you get over childhood traumas when your parent is dead and you cannot get any real closure?

Emotional trauma: There is a way. It usually requires the help of a counselor. Under the guidance of the therapist you practice or experiment with saying aloud what you feel you would like to say, or would have liked to have said long ago, just as though the parent were alive and in the room. The process of just speaking these feelings out loud helps them settle down. It is emotionally very draining but healing.

Letting go/accept: Psychotherapy can be very helpful. Even if alive many do not receive much back from their parents with confrontation - many are in denial and the whole attempt can be revictimizing (one can get hurt again or at least be invalidated). Gestalt strategies allow for closure even if the parent is no there, i.e., empty chair. Capable eye movement desensitization and reprocessing would work. Journaling ?

Get over trauma: I would suggest finding a good therapist who can help you work through your childhood traumas.

Healing: Healing is possible. Even with severe traumas. Healing comes with time; with work in therapy; with prayer; and with gaining insight into how you are defining feelings and memories. As one who got through PTDS from a very rough childhood, let me promise you that healing can happen and a solution can be found. It takes some work. It can often take some self forgiveness. At least it did for me.

There are several: techniques that can help you process childhood traumas even when your parent is no longer living. EMDR, hypnosis, psychodynamic psychotherapy, cognitive behavioral therapy, Gestalt and role playing are a few options. Speak to a licensed psychologist and figure out which type of therapy best suits you. You will 1st need to develop a trusting therapeutic relationship with them to do the trauma work.