I really don't understand why people like the prince anymore than they like the Duke.
They both drove their wives to extreme depression though the prince lead his to kill herself while the duke just tried to get a divorce.
Both the prince and the Duke have learned their leason, though we saw the Duke go through his learning experience while to the prince it's his backstory. Chances are that the Dukes behaviour would be corrected to be like the prince(probably better though) given some time.
So yeah, she just hopping from one slightly traumatized self absorbed piece of shit to another, more deadly, slightly traumatized self absorbed piece of shit