To think office moaners shouls STFU and stop dragging everyone down

[chaletdays]

Woman in here never, ever stops moaning. Every situation, no matter how positive to everyone else, has a moany angle for her. eg Moaned a few months ago because someone was recruited in from outside to a job instead of an internal promotion being made. Outside person has now left, job is being advertised internally as a promotion, and she is now moaning that she finds interviews too stressful and isn't going to apply and she should have been promoted ages ago etc etc etc
Yesterday she was moaning about something that is absolutely none of her business, and in the process dropped someone else in it.
She's just so negative and dreary to be around.
I know we all like a moan and a bitch sometimes but AIBU to think that permanent moaners are a PITA who selfishly pull down everyone's mood?

I used to work with someone like this. Hated the job, wasn't good at it, did as little as possible. You could see him doing things so he didn't have to deal with things (customer based). He would be late, try to go early, sigh constantly and every day would start the day with 'another day in this hellhole'. Dragged us all down,nothing was do e about the time keeping or not working. It was part of the reason I left.