They aren’t her fan club they are women who generally have a low opinion of men I think. Ioan probably has made mistakes, as we all do in life and no one is perfect but what is causing the divide is the difference between unintentional harm of decisions and intentional harm of decisions.
Meeting a new partner is not an act of intentional harm against your ex or children. People don’t generally set up home with someone new to spite or harm others, so the harm may be a by product of what is seen as being selfish by wanting to be in a relationship with someone who treats you kindly. Perhaps it is selfish to want to be with someone who supports you whilst you are having a difficult time. Perhaps it would be better for everyone else for you to spend 5 years sad and alone, fighting the same fight but by yourself to prove your virtuous nature but not better for you. Perhaps being happy makes you a better parent and being unhappy negatively affects your kids. Being happy when others are not happy can set an example that there is a chance of happiness after sadness.
I have 2 parents who divorced. One never met another person in 25 years and is bitter lonely and unhappy. The other met someone and remarried. One parent is nicer to be around than the other one. One is setting an example of a healthy stable relationship and the other is setting the example of how jealousy and resentment can ruin your life.
But Alice is causing the unhappiness and causing it to be prolonged too. She could choose to stop.
It is intentional to use your kids as weapons against their other parent - you know harm is being done, you continue. It’s intentional to commit crimes repeatedly against another person. It’s intentional to continually trash someone Publicly and to your own kids. That’s not making Alice or anyone else happy. So no one is happy in that situation, with no hope of happiness.
so no I don’t begrudge someone the hope of happiness - even Alice.