I feel like everyone adored her at first and then immediately left when another girl came. I personally still like kalfka best. (not saying I hate any other characters)
I think most people that simp for kafka are generally into the other mentally unstable women in the game too (i.e jingliu and sparkle, ruan mei a little bit, she's scary because she can just create things, like emanators of propagation and literally not feel bad, when the other two at least help people when needed). Don't get me wrong, she was the character I liked the most visually and aesthetically at the start of the game too, but she just went lower and lower as characters that I consider hotter or more beautiful got released. But I do still appreciate her beauty and plan to get her for my dot team. All in all, there are people who dedicate their whole existence to her, it's just that they're a minority.