Short answer: No, Capricorns aren't inherently mean. They're typically practical, reserved, and straightforward traits that can sound blunt, especially over text or in stressful moments. Their focus on results can read as cold, not cruel. If a Capricorn seemed harsh with you, your reaction is valid; what you felt was likely their efficiency and boundaries, not an intention to belittle or hurt.
To get along, translate their steadiness: assume sincerity, ask for tone checks, and request context when a message lands sharp. Capricorns respect initiative and clear timelines, so state what you need and by when. Notice what they do, not just how they sound; loyalty shows in follow-through. You can protect your feelings and still appreciate their grounded, get-things-done energy.