Hi John,
GP doesn’t handle the single product images from WooCommerce at all – you should see the same image when using a Twenty series WP theme.
I just had a look and the image isn’t blurry to me so maybe you’ve already solved this?
The letters on the wine are small so I don’t think it can be very visible without zooming in or increasing the Product Image Area Width option in the customizer:
https://docs.generatepress.com/article/woocommerce-overview/#single-product
Hope this helps 🙂