I once worked with a colleague within an academic setting for a EU wide project. We were understaffed. She constantly complained about how she works extra hours at home and on weekends. Well, my problem was she wouldn’t let me work at work because she used at least 5 hours of the day to trash talk colleagues behind their back (including me when I was on sick leave or, probably, out to pee). Damn I wonder why she had to work that much after working hours.