Was in this situation last year and one day I asked the lady where our 3rd coworker was, always late 5 minutes before start. She told me that lady had kids and had to get them to school. And I said hmm thats convenient me too. So I began coming 5 minutes late like lady #3 and the complainer had to go talk to someone else in the building and not me. Stopped working for free and stopped listening to mayhem. I'd avoid energy vampires if at all possible