Dear you:
I will always love you but right now I really don't like you. You are becoming a bad tempered, bitter old man and notwithstanding your mental health issues I have neither the emotional or physical strength to deal with you at the moment. From now on I have no opinion about anything so there'll be no need to shout and bang or curse under your breath if you disagree. Do what you want - I'm not interested. If and when you are civil, l'll be happy to talk with you.