I’m gonna be honest, in every customer service job I’ve worked I would not have given any of that a second thought. Working in a supermarket / bar / cafe etc means you see some actual arseholes easily often enough that “acting a bit odd” or “dressed unusually” doesn’t even register. You have my sympathy for any unpleasant experiences like that that you’ve had, because obviously just as much as customers can be arseholes so can employees, but most people on both sides of that just want to go about their day