You are missing the subtle manipulation here.
That's understandable. When manipulation lines up with your worldview it is harder to spot.
I'll point it out to you.
"Grover is a self-declared Terf, which stands for "trans-exclusionary radical feminist". Typically used [by who?] as a derogatory term for those considered [by who?] hostile to transgender people, it has also been claimed by some [who?] to describe their own gender-critical beliefs [which are?]"
Do you see it now? The use of the passive voice in the phrase "typically used" obscures that TERF is not an everyday term, but one used by highly partisan political gender activists, a group who are far from neutral and therefore a group whose assessment of what is "hostile" to trans people should not be taken at face value.
Similarly, the passive voice in "claimed by some" hides exactly who objects to genderist demands (mostly women) and obscures the basis on which these objections arise (the reality of sex, the fact of sexism and the needs that arise because of it), denying the reader the opportunity to draw their own conclusions as to the validity or otherwise of these objections.
Finally, contrast "Typically used", implying a commonly accepted standard understanding, and "claimed by some" implying a disputed, minority perspective.
Overall this statement is far, far, far from objective, and a great example of how to use language to delegitimise a valid position without having to actively engage with it.