Thanks for this post, I do relate to this too. I experienced a lot of anger and resentment (negative feelings in general) in my first months sober. To be honest, for me those feelings have lessened as I'm nearing my 6-month mark.
I like what Dee said, about dealing with emotions that I'd previously drunk away. I think those feelings that had been suppressed had to finally be felt. I allowed myself to feel them, but I didn't act upon them, kind of like an alcohol craving. I had a right to be angry about some of the things from my past.
I hope some of this helped!