TBH, it's not sexism to kick them out of the pro league. It was sexist to allow them in the first place. It's the same stunt other orgs have tried and failed in the past, by fielding a female team whose members haven't even earned Challenger status. When the team was formed, the only ranks that had been confirmed were Diamond and Platinum.
https://dotesports.com/league-of-legends/news/lcl-all-female-roster-vaevictis-esports
The new female roster features all rookie players who haven’t previously competed at a professional level. The team’s new jungler, Aida “Merao” Kazaryan, is ranked Diamond three in League solo queue, while mid laner Elena “VioletFairy” Koval is Diamond four and support Nataliya “Ankote” Zayko is Platinum, according to League statistics site op.gg. The other players’ rankings and competitive experience have not yet been confirmed.
They didn't earn that pro team spot.
Do I think females deserve professional status? Sure, but only if those players have earned that competitive rank, just like the males. The people in charge of the official leagues need to stop this forced female team stunt. Sirens flopped. Numerous all-female Chinese teams flopped. Vaevictis flopped. Team Singularity is pulling the same stunt again, using Diamond and Platinum players. Nobody wants to see Platinum players competing against Challengers unless it's an exhibition stomp, mixed All-Stars event, or non-professional streams.