Yes, sadly there was the inevitable screaming, swearing morality police here to set everyone straight from their unique position of often having zero actual life experience relating to what is being discussed. In amongst the more calm discussion were such delightful opinions as ⏤ oh, and I've had to cut some of the truly violent language, but I find it helps if you read this one to yourself in the voice of Gilbert Gottfried:
"The woman is an asshole [...] and your manager is an asshole for verbally abusing you. You probably should have simply refused to serve [her] but that probably still got you abused by your asshole manager. Look for another job, no one deserved to be screamed at until the screamer is hoarse. Mature, professional managers don’t behave that way."
Okay, so yeah, maybe people shouldn't scream at other people until they're hoarse ⏤ which feels a little disingenuous coming from this person, but whatever. However, I think that this person just needs to have a cup of herbal tea, and maybe go for a walk and calm down, babe.