Google Ads Specialist: Fix PMax/GMC Exclusions & Scale (800%+ Historical ROAS)

We run a highly successful, niche e-commerce store with strong, validated product-market fit. Over the last 60 days, our Google Ads account maintained an incredible 884% ROAS at a $6.37 CPA. However, over the last 30 days—and specifically the last week—performance has sharply declined down to a ~330% ROAS, and our CPA has doubled. We know exactly why this is happening, but we need a seasoned Google Ads & Google Merchant Center (GMC) expert to step in immediately, fix the structural bottlenecks, and help us safely scale our daily spend. The Current Situation & Bottlenecks We are currently running two primary Performance Max campaigns. We have identified three immediate issues that need resolving: Product Feed Exclusions: Our main Fully Custom & Mini Discs PMax campaign suddenly flagged a "poor ad strength" warning, noting that 90% of products are currently excluded from the campaign. We need an expert to audit GMC, identify the feed/policy violations causing this starvation, and get our catalog re-approved. Budget Capping: Our highest-performing campaign (All Other Products, boasting a historical 11.57% conversion rate) is constantly "Limited by Budget." We need a strategic approach to scaling this budget without breaking the algorithm. Bidding Strategy Preparation: We need to audit and align our Target ROAS/bidding strategies to prepare for the upcoming account-wide Google automated target transition rolling out on August 17, 2026. Scope of Work Immediate Triage: Audit Google Merchant Center and the PMax asset groups to diagnose and fix the 90% product exclusion issue. Campaign Restructuring: Optimize our PMax structure, asset groups, and data feeds to ensure Google has the clean data it needs to optimize. Scaling Strategy: Design and execute a data-driven plan to scale our daily ad spend on our winning product lines while protecting efficiency. Ongoing Optimization: Monitor target adjustments, negative keywords (via account-level/brand lists), and audience signals. Requirements Proven track record of managing and scaling e-commerce accounts using Performance Max. Deep technical expertise in Google Merchant Center, feed optimization (DataFeeds, Feedonomics, or native Shopify/GMC apps), and resolving product disapprovals/exclusions. Ability to look at data holistically—you understand attribution, macro e-commerce metrics, and algorithm pacing. Strong communication skills; you can explain the why behind your adjustments. To Apply: Please kick off your cover letter with the phrase "Feed First" so I know you read the full post, and briefly outline how you typically diagnose sudden mass product exclusions in PMax.