His eyes are too close together and his nose is weirdly scrunched. Not too much, and it wouldn’t be an issue if he weren’t so ridiculously ugly on the inside.

I’ve seen plenty of people who aren’t conventionally attractive and who are beautiful people. But when you’re that ugly on the inside, your outward appearance becomes a symbol of your inward rot. He’s not conventionally attractive, but that’s nothing compared to the evil he brings to every interaction. That’s why he’s ugly.