Allies versus competitors. I just made the same observation up thread.

Only once has this gone badly for me, but it went really bad. Tried to mentor a guy, two years later he’s our boss and everybody hates him. Like we go out for coffee to talk about how much we hate him.

Ladder climber extraordinaire. Gotta learn to watch out for those, but in this case he only connived in private and nobody caught on but one and he left.