How do I fix these Steam games icons?

Maybe this question was asked here before, but I'd rather have my own post than search for one. So I don't understand why the icons are either low quality, not loading or are just the Steam logo. Please help (don't judge the game selection 🥲) https://preview.redd.it/yhwl5vxemo7e1.png?width=1186&format=png&auto=webp&s=489d946e8145f0a1c0dc82faf3ba135270a1984f