Hands down it was the last boss I had when I retired. My previous boss (and a UK grad) had only been with the company about 4 years, and didn't know squat about our operation....but she understood that, and trusted all of us to do our jobs, and if there was something we needed, she did whatever should could to help us. She was a sweet person and beloved by all of us, and our success netted her a nice promotion.
They replaced her with another lady (Bama grad), who similarly had zero experience with our operations, but didn't trust any of us and was a micromanager of the highest order of something she knew nothing about. She was vindictive and if you tried to help her out by reasoning with her when you knew damn well she was making a bad decision, she would take it personally. She bogged everything down with needless "measures" that were only designed to make her look good and she hated it when I or any of the other supervisors would give our folks positive reviews. She would make unclear, ridiculous goals, then if you met them, she would simply move the goal posts. She also loved scheduling meetings close to quitting time and didn't care if you had to stay over an hour or two, and would irritate the hell out of you with emails, texts and phone calls if you were on vacation.
In April of 2015, my wife (who worked at the same company but in another division) wanted to retire, so we went to talk to Fidelity about what we needed to do to set it up. Fidelity told us that not only was my wife in great shape to leave, but I was too. I nearly cried when they told me that, because I was figuring I was going to have to work for this ***** for another 2-3 years. Three months after that during a less than flattering performance review, I just stopped her and told her that I didn't like working for her....and that I didn't have to work for her. After turning in my retirement notice, I briefly saw her once in the last two weeks. Since I left in August of 2015, there have been 10 other people who have either retired, left for another job, or been fired. One guy who retired in early September told me that after 32 years, he'd rather work at Lowe's than to work another day under her. I also know two others under her who are actively looking for other jobs. Her dad is pretty far up the corporate management chain, and that's all that has saved her so far, but she recently got pulled onto the carpet by HR, so my guess/hope is that her days are numbered. She's nothing but a spoiled, hot tempered brat always used to getting her way.
Overall, I was pretty fortunate on supervisors over the 34 years I was there. Had a couple that I didn't care for personally, but they at least respected my work. This ***** had zero respect for anyone.