What gets me is that a lot of the time, they react like you're the asshole for being forced to ask them for shit that they should be offering.
Like...ok, you forgot a lot of shit. Sure. But that's on you. I'm not trying to be a dick about it, but it's your fuckup. Try to fix it, apologize, etc.
I'm not looking for self-flagellation levels of contrition here...just an acknowledgement, or the realization, that they fucked up would be nice. 'Oh, I forgot to ask if you wanted ketchup, here!' <dumps copious amounts of ketchup packs into your bag without having some sort of 'resentful cunt' look on their face>
But instead you get people who actually get irritated at you, the customer. And I'm generally non-confrontational, so it irks me when I'm forced to sit there and yell at the dude to open the drive thru window back up because he's already cut me off and doesn't care that I'm missing shit.
I've worked at McDonalds in the past, and I know full well that this shit is all just standard SOP. Drink, straw, receipt, condiments, napkins, etc.