The conversation degrades at some point and spirals out of control
identify that and walk away, leave that subject alone. This is obviously big picture advice.
In the past couple days I have "led" by walking out of conversations that became unproductive. Yes, wife's words followed me out the door and even this morning she came out and "reprimanded" me in front of the kids.
My response was to stay calm, ask her to go discuss privately (to her credit she did). I listened to her concern in private for one minute. Reiterated that I needed a break from the conversation and stated my expectations (also the expectations of the MC) on "taking breaks" from conversations and I left the room again, this time with words following me again.
To her credit, she has not "corrected" me again in front of the kids.
Throughout it all, I remained "kind but firm".
She is in charge of how she remains.
Now, to your situation. I think you are doing well. Likely better than I would do. Keep pushing to exit unproductive conversations.
FF