To quote one of their posts directly: "I view people as more tools than anything, and I’m working on being nicer. I say this with 100% honesty, not because I’m being mean. I still feel like I deserve friends, though.". They also post about calling their basketball teammates useless and about hiding behind other players so they aren't actually open to receive passes (but somehow this is a failure of the team's strategy?)

If it's a real person, then I wouldn't necessarily call them malicious but definitely lacking in empathy. But I'm leaning more towards it being a troll.

Well, she herself says she has no empathy for others and “treats them like objects”. I said mentally ill because she seems to have mood dysregulation problems, no one is ever good enough for her, and she seemed to openly have a breakdown when she posted to her one friend about hating that she was autistic or something. (The post has since been deleted).