Swallow your pride and break into any denial about how your angry acting out does not hurt your child. If your conflict with your ex spouse causes problems in your new relationship, get help. If you and your new love can't get it together on discipline, take a step parenting class or at least read some books on step parenting. If you can't work out your frustration on your own, get help. Use your anger to make a positive difference in your future.
Anger is a momentum which gives energy for change.
Use it to get off dead center and invest it in making a difference. Go to Divorce Recovery classes or anger management counseling. You only get one chance in the raising of your child. The childhood years cannot be taken back and redone. Professional help is available.