Holding on to the hurt caused by an action/activity, called resentment, erodes peace of mind and is an impediment in personal growth & Joy. Assigning blame relentlessly to someone or something responsible for the pain inflicted does not let one find an outlet to the anger which causes great turmoil in life. It is difficult to successfully divest self of resentful feelings but choosing to let it go voluntarily helps in easing the feeling of pain & suffering. Make an effort to shift your attention from those you resent back toward self to move on with lives.