How I behaved, loved and served others in my life is all mattered actually, as that shaped me what I am today. A feeling of compassion arises in me seeing such people. They have no option to leave themselves for life! I am lucky at least only few moments, days or years is what matters me to bear with them. Then I am again free. It is my life, the other is not at all matters in it leave alone his behaviour, grudges, sabotages etc.