But Cottage-core is in the aesthetic section, not the pessimist section. I also know quite a few people with this general perspective and I don't think any of them would use that label. (To reference another comment; this seems like a Very Online label)
Ultimately this perspective doesn't neatly fit into any of the pidgeonholes the author has created. This is a problem with trying to categorize large numbers of humans into sequential, unrelated categories.
From the article perspective they are in the pessimist section. As they are pessimist avoid improving the current state.