I left a few years ago. I actually liked L3 when I was in the interviewing stage, and was thrilled to get an offer. In the beginning I thought it would be a great next step in my career. But, when I arrived, the department I joined was in shambles. There was no manager, no supervisor and only a clueless Director who arrived every day at 10:30 a.m., and was out the door before 5:00 p.m. (How she managed it, I don't know.)
They allowed a person who had no experience leading team to take the role of our supervisor. She had almost ten years at L3, but in roles that were of no real significance to consider (in fact, the executive team member that I interviewed with said as much.)
She immediately took her new job title of supervisor to a mean and nasty level, acting as if the department needed her vision alone. It was a total joke. She gave preferred treatment based on her friendships, and other politically-correct motivations just to keep management happy.
She was mediocre, and they loved every bit of it.
It's exactly why I left. I knew that my education and experience would never be valued. This supervisor was jealous that I was smarter, more skilled and with a better sheepskin than she'd ever be able to offer.
She went out of her way to allow the green-eyed monster to rule our department.
Her style was to act like a child and wanted others who were willing to do the same.
Not a good fit for me, so I left. She's the kind of manager that L3H now values.