I don't know your whole story and I am new here. Maybe you can turn around your thoughts. Was your ex husband a tool? I felt nothing but pity for the new wife when my ex husband remarried. If I saw her in person I would have told her how sorry I was he fooled her and to run.
Maybe if you can turn it around in your head it won't be so bad. Be glad you are rid of the jerk. Think of her dealing with the parts of him you hated. My 1st husband was an abusive controlling super jerk. I am glad to be rid of him. Maybe you can be too.
I can understand how you feel, but I hope you can turn it around and remember the parts of him that led to your divorce.
I didn't date anyone after my 1st husband. I was fed up and done with men. When I met my 2nd husband I straight up told him I was not looking for a man.
I felt sorry my first husband was tied down again immediately. He seriously got remarried right after the divorce was final and didn't even tell anyone!! It was a secret marriage. Nothing like being a secret bride. lol But I was enjoying being single with no one telling what to do. Maybe you can embrace that kind of attitude. I hope this was kind of helpful. I am sorry you are going through this.