Relations may still be very strained with your ex after a difficult separation and messy divorce. You still feel very bitter towards them and would prefer not to have to set eyes on them ever again. All of which is totally understandable. However, you have children together. For this reason, like it or not, your ex will always be in your life.
You will be co-parenting your children for the rest of your lives.
This is a very challenging situation..