I am confused that people are unhappy with the Witcher Ciri

After the trailer for The Witcher 4 came out, I was shocked and delighted that they didn't reinvent the wheel and cast Ciri in the lead role. But imagine my surprise when I saw the stench on the internet (a truly diabolical place) because "...crickets" - the witcher is Ciri. My reaction to this was one: so what? Can someone explain to me the meaning of the discontent or is it really sexism?