Its meant to be derogatory by the in-universe person who documented the stats sheet. The assigned title, for lack of a better word, is a jab intended to further slander and isolate her from the mutant community. Its also clearly being posed from a very specific vantage point.
I enjoy Wanda and I enjoy the X-Men, so I'm not arguing that its insulting and therefore bad/wrong. Its meant to be insulting. So to me, it makes sense. Narratively.