I too can relate to this post. The older I get the angrier I seem to be. It really bothers me especially w/ my kids. When I try to understand why I feel like I have a great deal of resentment in my life & I resent that person from my youth for not listening to herself but to others & being a people pleaser. I'm now in what I call my "eff you 40's" & telling myself that it's ok to have a voice especially when I'm angry. I also make sure to talk to my kids to explain to them why I'm angry. I grew up thinking that my parents were fighting & it was about me. They never explained why their angry & that it's ok to express it...it a much healthier way.
Hope this helps.