I have a co-worker named A. Last year we had a major project for our biggest customer going on. I had a management type role as did my closest work friend, B. A had not been at the company very long and I didn't know her very well. I had heard she had a run-in with another co-worker, where she refused to do the work he asked her too. Since I didn't know the whole story, I didn't pay much attention to it. After talking to her it became very apparent that she really wanted to do management work. Not that there's anything wrong with that, but our work is very project driven and on one project you could be the lead managing multiple people and the next project you could be doing the most basic tasks.
Eventually, she got her "lead" role, but she was still reporting to B. Prior to this A and B had gotten along great. As soon as she started to report to B, suddenly there were problems. B wasn't totally innocent, but the majority of the conflict lay with A.
Then we found out this was a trend with her. Another co-worker, who she had always been friends with, got a bigger role in the project. Suddenly A started treating her badly. I got a minor brush with this, a bunch of us went out for drinks and she asked me what rank I was within company. Apparently it was higher than hers (and I'm 5 years younger) so for 2 or 3 days she wouldn't talk to me. She had several people reporting to her of varying experience levels. All of the more experienced people she had conflicts with, or would bad mouth about not being able to do their job. The only people she could get along with were the younger ones, because they didn't ever question what she told them. Then the way she was managing things wasn't working, so one of the project managers had to step in to help her. Finally at one point, she did something so bad, that management sent her home for a couple of days (highly unusual in my office).
After all this, I just found out that she applied for and received a promotion. I guess I could understand if within the last 9 months (since the major project) she had improved or demonstrated that she could work with others. She still did not accomplish that in my eyes. Everything she has worked on, has been either a solo thing or working with one of the younger people who she could boss around. Her very nature goes against our companies standards, and I'm just furious that they would reward her.