I’ve worked with these cheerleader types. They have mastered the art of not doing any work, always nauseously happy about everything, even when it’s not appropriate for the situation, and are nowhere to be found when a project or task is due and you need help. In the worse cases, they play politics and actively undermine anyone who is critical of them or point out their (lack of) actual contributions.

If someone is overly enthusiastic and doesn’t have the skills it’s not always the case but often they are running a game on you.