We all agree terf has not been a useful term for a long time, it implies they're feminists, it implies they're for women, it reinforces their arguments that they're on the side of women and gives them space to hide their more extreme elements.
Why not something like cis-supremacist? Something that is far-right adjacent would be useful in making people properly make this connection, especially given who they're allying with lately.
Exactly, this is cis-supremacy. Their goal is holding cis people in a supremacist position and keeping trans people heavily marginalised, they didn't care about trans people improving their lives whatsoever until eggshells started to break in extremely large numbers, then it was suddenly a threat to the system. The numbers of trans people rose above a level that became threatening and these supremacists seek to eliminate or suppress that.