Shoes, I'll give you. But 'jeans' is a problem.
You can't have one 'jean."
You might concentrate your criticism on the clerks who refer to a 'pant'.
"You might want to concentrate your criticism on clerks who refer to a 'pant'".
Reminds me of a comic bit by Gallagher, I think; "Why do we have A bra, but a pair of pants?" Same bit with "Why do we drive on a parkway and park on a driveway?"
At least the pants have legitimate history. At one time the lower male body was clothed with two separate leggings with a codpiece, or merkin, where the modern zipper is.