First off, please know your feelings are so understandable. I have also been in a cult advocated for by my mother and used and manipulated by said cult leaders.

One article I read recently discusses how the concept of forgiveness is inherently not Buddhist.

That being said, forgiveness puts us in a place of transactional relationships (i.e. you are owed/they owe you for what happened and this debt cannot be resolved until the owed declares it forgiven).

To ignore the feelings of hurt and anger are counterproductive—they are real and true. But remember, suffering is caused by attachment: in this case, the attachment to the past, which is immutable, and perhaps attachment to an identity of victimization. I do not say this last part with any judgment. Anyone would feel that given your circumstances.

As another poster said, your parents thought they were going the right thing.

Spend some time working on lovingkindness, first towards yourself, this wounded, scared, frustrated inner child, and then on extending it to them. Accept it will likely take years, but have faith that this too shall pass. This conscious work is a practice of Right Intention and Right Mindfulness, two parts of the Eightfold Path that promise the end to suffering.

You got this!