Motivated By: Insecurity
How They'll Ruin Their Own Life: An Unevolved Gemini will completely wear themselves out trying to figure out who they are, drowning in angst about it all along the way. Are they logical, emotional, introverted, social? Many will abuse drugs and alcohol to cope with the flickering question mark they feel deep inside.
How They'll Ruin Your Life: Because they don't know how to handle their deep insecurities, they will project their issues onto you with judgments, sudden mood shifts, and accusing you of being "too this" and "too that."