It's wrong to hate someone because they're praised.
Carl sees his co-worker get a promotion for the work they did and feels conflicted because he was not promoted.
Carl wants to make sense of his feelings.
Carl decides that he should use his co-worker as an example of how to achieve goals.
Carl decides that he should dislike his co-worker as they have achieved something he has not.
Carl becomes a better worker with goals he wants to achieve.
Carl becomes bitter towards his co-worker and that interferes with his work.