Collection thumbnail image quality being downgraded

[web3htm-mbs]

I have tried resizing images to the exact size of the container, changing the collection img url to ‘master’ , and tried directly calling the image from the file server. All options still end up with a slightly blurry image for my cards that I have made for my homepage and I have no idea why. Link to my store https://www.plotterpaperdirect.com/