Wikipedia has very strict aims at neutrality. If you look at a wikipedia article for another, even more hateful, site like kiwi farms, it doesn't explicitly call it out as a hate site, just lists its controversies. RationalWiki doesn't have a neutrality stance, and explicitly calls Quillette an alt-right publication and points at why.

You may feel that it reads like an angry teenager because it directly points at the hateful things on the site while ignoring the non-hateful things, but again, the point of an alt-right site is the mix of content, used to lure non-extremists in, to slowly recruit them to extremist views. It's a gateway site for hate.