First off, It is OK to be angry. It is OK for you to be angry and it is OK for WAW to be angry.
When I feel angry, I feel the anger but do not react to it. I then stop and determine why I am angry. My natural instinct is to project my anger at someone else. This is NOT HEALTHY. It only fuels the fire. I now channel that energy into positive changes in me.
One example. S10 wants to spend to night at my house during MsR2C's parenting time. Simple request, right? Anyway MsR2C is not allowing this to happen, even though I let S10 spend night at her house multiple times during my parenting time. I start to get angry. Normal thing is to blame her. Stepping back, I determined that I am angry with myself for not getting "First right of refusal" in the D paperwork. She will send kids to her parents without giving me the option to have S10 over. Still working on the overnights. I became rigid with the parenting time. I will let her "BE ANGRY" for awhile, then communicate that flexibility on both sides is better for our kids. Anyway, long story short, I take the anger and channel it into better communication, better boundaries, etc. I do not focus it at MsR2C.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712