Don't dwell on life's hurts, misfortunes. Look at them but long enough to know them to become wise from them, then go on your way. Of course, in real life not everyone is as quick as the other. And some misfortunes just seem to to take some time to know and own. Rancor, cynicism and bitterness are immaterial, whether one may be just and righteous in it or not.
Obsession is fatal to everything lovable in a person.
Most everyone wants to be happy. Some have lost that desire, having been submerged and overcome by their own bitterness. Some have just gotten lost, not having been able to break away from various self oriented strategies. And, some have been redeemed. . . Maybe because someone who had nothing to gain by it stopped long enough to care.