Hello,
1) You use featured image with 19px height. It’s very small. It would better to create and use image 300x300px at least. Or add the below custom to add min height for the product images
.content-product .product-content-image {
min-height: 200px;
display: flex;
justify-content: center;
align-items: center;
min-width: 200px;
}
.content-product .product-content-image img {
width: auto;
}
2) Create image 300x300px at least, for example https://prnt.sc/125jdr9 . 82x19px is too small image. There is no option to hide the featured image from the product gallery.
3), 4), 5) We don’t have such option. You can try to implement this using additional customization and WooCommerce hooks https://www.businessbloomer.com/woocommerce-visual-hook-guide-single-product-page/ if you have PHP skills or submit additional customization request here.
Regards