Shahrukh khan perspective - After his big accident, the care , the mental support he should get from his spouse , he could not get. He got bitter day by day. Seeing his wife doing everything and the thought of not being able to support her was killing him.On top of that the one thing he was passionate about that is football,he lost the ability to play it ever again.
Preeti Zinta perspective - After his husband big accident , she had to take care of the whole family.After a while she achieved everything she wished for in career.She wanted that her husband would acknowledge that how much hard work she had put in to support her family and to cut her some slack for not being able to pay attention to her child.After a long tiring day, she wanted that her husband would talk to her politely.
Abhishek Bachchan perspective - He loved a girl and married her.He loved her deeply.The only mistake he made was to make that the girl he is marrying want that relationship or not as she was having second thoughts before marriage.They never communicate the real issue and the one time they did that was the breaking point of their marriage.
Rani Mukherjee perspective - She married a boy out of friendship even when she knew there was no scope of love.When she met Shahrukh she connected with him instantly.Had she never met Shahrukh, perhaps she continued to struggle in her marriage and never would have courage to address the real issue there.After meeting him she gained perspective and realised that Abhishek was not meant for her.