Holding company agencies like Omnicom, WPP, Publicis, and Interpublic shops are structurally incapable of managing Google Ads the way the platform demands in 2026. Their staffing ratios assign junior buyers to too many accounts, quarterly strategy cycles lag behind weekly execution needs, and volume rebate incentives misalign their recommendations with your profitability. This piece breaks down exactly how these structural problems show up in mid-market and growth-stage accounts, what questions to ask your agency to expose the gaps, and what alternatives match how Google Ads actually needs to be managed.