No matter how many faults Molt has, at least it was because he had an empire to watch over and this forced him to be stricter.
Besides, if he loved his children, but he couldn't show weakness (and having an animal like Zorzal as a son is not a good thing).
Ozai always thought of himself, which makes him unable to care about others.
Homelander is a psychopath...people like him are not designed to raise and guide children.