I have been separated for over 4 months. At first I did not lay any anger at the feet of my WAW. However, it is important to know that it may come to you overnight. I have even tried to get angry over what my W has done to me and our lives. I could only stay mad at her while I was thinking about and when I stopped thinking about it, my anger would go away. Just recently I had about 3 weeks of total anger about my sitch. Fortunately, I had someone I could vent to and or I would tell my C or I would write it down to get it out of my system. In my case I have to vent my emotions or they will come out when I can not control them. That could be a bad thing if it is done at the wrong time with your WAW. I am not angry now and I feel better. I still ride a rollercoaster however.
Anger is part of the heeling process. If you actually going through the healing process then hang on you will get angry, but when you do, control yourself. You don’t want to damage your sitch anymore than it is already.
Was part of your problem in your sitch was your anger? Maybe you don’t angry because you are not totally behind improving your R/M.