noun
girl with low self-esteem; girl who makes things difficult for herself
Colloquial term for a young woman who overcomplicates her life due to low self-esteem, often overthinking relationships or social situations. Derived from 拗らせる (to make worse, to complicate).
See also: 拗らせる
彼女はこじらせ女子で、すぐに「どうせ私なんて」と言う。
She's a girl with low self-esteem who quickly says things like 'I'm not good enough anyway.'
こじらせ女子あるあるを漫画にした。
I made a comic about typical behaviors of girls who overcomplicate things.
The verb meaning 'to make worse' or 'to complicate'; こじらせ女子 is derived from this verb and describes a person who habitually does this to herself.
From 拗らせる (こじらせる, 'to make worse, to complicate') + 女子 (じょし, 'girl, young woman'). The term emerged in internet slang and women's media in the 2010s.