We audited 100 content calendars from brands, creators, agencies, and in-house teams, and the patterns were impossible to ignore. No matter the industry or audience size, the same mistakes showed up again and again—costing teams engagement, consistency, and long-term growth.  Here are the ten biggest issues almost everyone made.  1. Lack of Clear Objectives Many calendars were full of ideas but lacked clear goals. Teams posted content without defining what success looked like