Could you grammar-check?

In the following numbered sentences, which is/are OK? In fact, do I have to add have or have been?

I knew that Ken’s characters were fascinating, but he continued to think of women as inferior. He married Naomi, but their married life didn't last too long, which wasn't surprising. She had thought of men as inferior. They quarreled very often with each other. But one day, he snapped and raised his hand. After that, she was carried to a hospital in an ambulance. According to a nurse, she heard that Ken had shouted to Naomi “You should have been proud of my job, prestige and status as a man, more!” in the hospital.

1. I don’t know what Naomi should have been proud of, but I’m sure what they should.
2. I don’t know what Naomi should have been proud of, but I’m sure what they should have.
3. I don’t know what Naomi should have been proud of, but I’m sure what they should have been.

It’s their difference! Women and men are different. They should have liked themselves and treated each other respectfully.

Thank you.