b-teamer
A person who gets stuck on the B-team because they’re not good enough. They’re the kind of people who try to talk their way into the A-team but still end up being the worst.
He tried to talk his way into the A-team but still got stuck on the B-team.
She’s a B-teamer and still thinks she can beat the A-team.
He’s a B-teamer and still acts like he’s better than everyone else.