Taking things easy and trying to go back to normal can be one of the challenging things in life. Trying to give it your all to make things workout though the objections are too high put forward by the people around. It is not easy overcoming them, especially when you have been intentionally or unintentionally on the wrong side.
It was no different for Huo'er. He has been oblivious and misguided by the enemies he didn't know about, doing all the things that is against his own will, killing, reign over people, ditching the only people who wanted good for him, having no memory of any part of his life.
Imagine the feeling you would go through when the person your family loved, respected, and died for goes with the person who murdered you. If Aenon and family are holding grudge, they have a reason don't they? A reason even though they had no idea of what was happening around Demon King's life?
