I've been lucky in so much as that in 36 years in the same job until I retired and working with probably over a thousand people in that time I haven't come across too many people who could be described as 'toxic' .. having said that I've worked with a few assholes mostly section or office managers with all the man management skills of a concentration camp guard.
They fell into two categories ,,, folk who were promoted above their abilities, certainly so far as inter personal skills were concerned, and folk who thought the way to manage an office was to micro manage, pressurise, and bully the staff, with one spectacular standout in that category … her continuing presence as my office manager was certainly one of the items in the 'pros' column when I was deliberating whether or not to take early retirement … she was so bad my section manager at the time would literally shake with fear when she entered the room.
I've worked part time with the NHS for 15 months now and I've yet to meet a nasty person … touch wood
One of my all time most hated expressions was and still is … 'aye, but he / she is really nice outside of work' …. well if that's true then it shouldn't be too hard to stop being a prick in work, should it?
Sorry mate … all of that isn't much help to you I suppose, but it gave me an excuse for a rant so cheers