talk at cross purposes
To talk with others in a way that promotes or maintains conflict or opposition. You will never find success if you continue to talk at cross purposes with your teammates.
be/talk at cross ˈpurposes
(of two people or groups) misunderstand what the other is referring to or trying to do: Mary and I spoke about Anne for a minute or two before I realized we were talking at cross purposes: I meant Anne Smith and Mary meant Anne Harris.