I'm mad at my grieving father
What happened that you'd be angry at him?
My dad has been telling my brother and I what to do for a long time and we finally had enough.
While it's certainly understandable to be upset by his behavior, he seems like he's going through a lot. Could you try to avoid airing your grievances until it's not such a difficult time for him?
Who cares? My friends told me that these things need to be said.
Your father is having a difficult time and needs your support. Whether you feel upset or not at him, directing your anger and resentment at him right now is not constructive. Find your compassion for him and be there with him.