> I have never had anything like anxiety, before nor after coffee. I suspect that for many people's cases with such things, other dietary changes (including unnoticed enormous amounts of sugar with the coffee) may be the real culprit. But it's so hard to say with individuals.

AIUI there's a well established genetic component to caffeine sensitivity and metabolism.

Personally I find dissolving in a spoonful of lions mane mushroom powder takes the edge off and also seems to mitigate withdrawal symptoms should I choose to take a break for more than a day.