Do not think about things like that. There is no benefit in grasping and thinking about it. You have to let it go. Everything follows the law of karma naturally, there is nothing we can change about it by thinking about it much. If your family members treat you bad in this life, it is the result or karmic creditor of your own past actions. We are responsible for our own karma, we ourselves have created the causes for all our experiences. Enemies, obstructors, mischievous relatives, etc. are only conditions but not the cause. Moreover, the past is gone, it doesn't exist any longer, we cannot change the past, we have to let it go, so do not think about this. What is more important is that which is actually in your hands, the future. Thus you should rather give rise to love and compassion in order to ensure a happy future. If you think about others' faults you will only get angry and resentful. Think about their qualities and stop thinking about their faults, then love will arise. If you can't stop the thoughts, think of Tara and recite her mantra. The Buddha said, "Perfectly tame your own mind, this is the Buddha's teaching." The Buddha did not say, "Perfectly tame someone else's mind." You have to purify your own mind. If you cling to these thoughts of resentment and frustration again and again, you form a habit, and this habit will manifest before you in the Bardo in the form of a delusive perception which is the projection of your own mind, just like a TV show. This is what creates hell, it is the projections of one's own anger and resentment. Let go of it and make an effort to cultivate love. The only thing you should hold on to is love. Then you have no fear when you die, you will be born in the higher realms and slowly attain enlightenment. So do not worry about the faults of others, rather purify your own faults.

-- Garchen Rinpoche