People " around" AA - ones there for the wrong motives and/ or don't understand the steps- will respond like that.
I have a feeling that in your relationship with him he did a lot of blaming- pointing the finger at you. Which would lead me to believe that's why yer feeling the way ya do.
You have nothing to be shameful or regret. You didn't force a drink down his throat or cause him to get in the predicament he's in. That's all on his shoulders.
And ya can't cure him either. That's also on his shoulders.