You Aren't Angry
Anger is bad energy to take into a new relationship. It represents emotional baggage. It is unresolved hurt that consumes valuable space. Anger is part of the grieving process and a necessary one, but it is the wrong stage to explore dating.
There are two kinds of anger: situational and what I call, pervasive.
Situational anger is appropriate because it is current and in response to observable stimuli. For example, your ex is supposed to drop off the kids at 2 p.m. and doesn't show up until 6 p.m. thereby causing you massive inconvenience and worry.
Pervasive anger is a bad hangover from your failed marriage. It is not current and it is not in response to identifiable events. This is the anger that represents your homework to resolve. Ask yourself what it would take to let go? If your answer is an apology from your ex, forget it.
If your ex really cared that he or she hurt you, they would have stopped or said sorry before it was too late. So what else can you do to let the hurt and anger go? When you figure this out and break free, you are ready to date.