Feed quality ignored
The Shopify Google channel exports your product titles as they appear in your store — which are written for brand presentation, not for Google's search matching algorithm. "The Aria Dress — Sage" is a store title. "Women's Linen Midi Dress — Sage Green — Size 8–18 — Machine Washable" is a Shopping title. That difference determines whether Google matches your product to buyer searches or cycles your budget through irrelevant queries.