I don’t give a Karen

The term given for when one chooses not to delve into “Karen” like excessiveness about a certain issue - yet by saying so encompasses all that a “Karen” would say in a sentence therefore using less time and energy on someone not deserving of time or energy.

“ I don’t give a Karen” could particularly be used to flip someone off.

In response to a person getting PC about you cutting a queue:
“I don’t give a Karen about your queue etiquette”