Who the fuck finds game Ciri to be unattractive? She was specifically made prettier for the new medium. The books describe her as a tomboy with ashen hair, huge green eyes, young face, tall and slim. Later on, "losing on her charm" by being fed meals for what basically amounts to supersoldiers, despite being a kid and putting on weight. Even in the trailer for W4 she is depicted as the game version - no babyface, no "tomboyishness" etc. She literally is an hourglass shaped woman in a skinsuit.

What's annoying as fuck is her being a mutant, not her being a woman. Witchers were successful because they had gone through mutations, which had like a 30% success rate for boys in the optimal moment in their life - pre puberty.

At the end of Witcher 3, she is a 20 year old woman. Post puberty, hasn't been brought up preparing for the trials, quite the opposite - she had a relatively normal life. It's like comparing a chess prodigy that has played the game since they were 4, and a random dude starting chess at 30 yo. Multiply that by 300x - since the mixtures were specifically made with human physiology in mind - with Ciri basically being a demigod in the universe past Witcher 3. Add in the fact that passing the trials basically slows down aging to a crawl, but she looks way older in the trailer.

The reality is, it doesn't make sense from a lore perspective. But someone who doesn't care about the lore made a decision that Ciri is now a Witcher, so she somehow has to be one. In reality - the trailer basically made her a Mary Sue of the universe (if she wasn't that already). She is both a witcher and a mage and has unique bloodlines that give her additional powers.

What they could have done, is a million other things. Prequel to where witchers were created / early days of the cataclysm - conflicts between the original occupants of the universe and humans and monsters. They could've done a prequel with Vesemir. They could have continued wirh Ciri, but with her actual powers, instead of making her a witcher. They could've made a character creator letting everyone design their own witcher - with whatever characteristics they want.

People are pisses off for the same reason why the Netflix show quickly started sucking and why Cavill left it behind. Writers not caring about previous lore at all, pulling their own out of their ass because they think they know better than the author of the universe (who granted is a fucking asshole, but still).