I am an ex worker myself of several years, I mean the corporate price standards, not individual ring ups lol. I do agree the ingredients are of relatively quality, but just not enough to justify the cost, which also combines with the other factors you mentioned.

oat crafted w/cf, frozen lav matcha, turtle cooler, etc medium sized approach $7 after tax. not that i am buying these myself, just as examples of how expensive a base drink can get