I think you have put yourself into an evil cycle

you fight with D, D complains to your boss and obviously your boss trusts D more than he trusts you. Your boss tells you to listen to D's idea, you hate her even more and fight even harder.

There is a saying that you can't change other people, you can only change yourself. So the only one who can break this cycle is you. I would say stop fighting with D. It may work it may not since the damage is probably beyond repair by now. But try this first.
Otherwise, move on.