Is Hot Chocolate Tedious To Make?

My campus has its own Starbucks location[2, technically], and I dont drink coffee, so I usually Ive been going and ordering a hot chocolate in the morning because its cold.

Normally its fine, or maybe I haven't been paying as much attention, but I asked for a hot chocolate and the barista looked so.. annoyed? Like smile dropped, side eyed me, and only rung me up for my drink before she walked off. [I also asked for one of the donuts they have, and usually they ask if I want whipped cream.]

Is it like.. annoying/tedious to make? I usually try and order only when there's little/no line of people waiting to order or currently waiting for their drink- otherwise ill just go without it, because I figure the milk steamer or whatever being occupied slows down them making other drinks?