A few suggestions:
The category field is unwieldy with some categories being topics like "Anime" and others being site formats like "Blogs". If someone wants to find sites about anime for example, they'd miss all the ones listed under "Forums", "Blogs", etc. unless they checked each of those categories and sifted through all the non-anime sites. Not a big deal now, but in the future that may be thousands of links.
I think a good solution would be to put site types and topics in separate fields, as well as adding more topics in general such as technology, art, etc.
The site could also be made more compatible with non-modern browsers by allowing non-https connections as well as not using webp for the banner image
Really great site aside from that though