Hey NG. It's good that you know when to hang back and take care of yourself.
Good ideas on processing the anger. Sometimes I find it helpful to remember that it's our thoughts that set us up and lead us to certain feelings. Sort out the thoughts. Which ones are helpful, which ones not?
Also, anger is commonly a response to our needs not being met. Can you identify the needs and grieve those losses directly?
And the usefulness of anger is to motivate us to effect needed change. Embrace that, once you've sorted through it a bit.
...just some more processing ideas in case you run short.
