In her state she is looking for anything to fight about. No matter what you do, you'll be wrong and cannot be right.
^This is often the case and probably true here. If you properly communicated your plans and didn't shirk any responsibilities then you have nothing to apologize for. It's likely just resentment built on her side putting you in a no-win situation.
Me:39 Ex-W:37 M:7 T: 9 S:6 D:3 BD/IHS/Confirm EA/PA: Feb '20 OM1 affair ends: May '20 W/OM2 & moves out: June-July '20 W files for D: Jul20 OM2 confirmed: 9/2020 Divorced: May '21