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A couple of thoughts on this one.
Twenty five years back I had job interview where I revealed I was a competitive person and the interviewer remarked that some would regard that as an infantile character trait
Another item was an individual who no matter what his dealings with anyone were turned the interaction into a contest that he was going to win. He was right, and the last word was always his, he wins. Though in the long run, he didn't.
There could be a connection.
Make sense, or another bin job.