Thank you for your kind words, marelli. Yes, my suggestions were tongue in cheek, the idea being that you need to do something effective to stop silly critical moaning. DH used to look worried when I reversed the car from where we park it in order to drive down the hill. He does a three point manoeuvre. I do a curvy reverse and go. He kept saying I was going too close to the oil pipe. So one day, as he put on his strained face from the kitchen window, I stopped in my usual place after the reverse, went inside for a tape measure, measured the distance, went back inside to put tape measure away, and said "Two feet" as I left. Not a word nor a strained anxious look since.
If he did, I'd say, directly but quietly, "I want you to stop criticising the way I move the car; it is unnecessary and I object". Unless the person doing the criticising is unreasonable, they'll get the message and stop.
Things you find stressful that other people don't notice.