Lots of examples. but the most blatant one they openly admit is kinu
Here is a quote out of her design document.
"Once out, she'll have grown into a young woman of about 18, enough to tease all the Helspawn incest demanders and yet be kept out of their reach forever."
From the Child Kinu design document.
And I believe in his forum post for his works, he goes into more detail but I'm not trudging through that.
For some context. Savin wrote an incest daughter in a project termed "helspawn" (the daughter of helia) in CoC1.
people asked him to finish it.
he got extremely angry at being asked to finish his own project that he started. (a very common theme with him) that he made kinu entirely to spite those people.
Also this forum post by the writer for kinu. tobs explicitly says she was a spite project.
tobs self identifies as a "mean spirited psychic vampire" and is the top attack dog of savin (having personally went after writers who displease savin by being more popular or not letting savin shit their characters up. like wsan who writes the taur waifu who is the number 1 most popular waifu. and who tobs sneaked in some cuck content for against their rules specifically to spite wsan because he didn't permit savin to write for her.
You can also see this post here
You must be registered to see the links
where tobs EXPLICITLY states that kinu is a "spite project and a salt mine".
It is worth noting that the vast majority of people being fucked over by that spite project were not even asking for incest with her.
They literally turned her mom abusive towards your daughter, made you miss kinu's childhood, made kinu hate you the player who is her father, made BOTH kinu and her mother suddenly become racist against you the player, and forcibly humiliate you the player in some weird psuedo cuckoldry where you are also forced to say things like a fucking doormat.
And the entire thing is completely unavoidable. they tease you with avoiding it... but it is a trap to make you make things worse.
If you try to stop the first arranged marriage candidate (who unironically has the official motto of "While you were partying, he studied the blade and has 2 action points") who is hostile towards you and also racist against you and literally tells you he wants to kill you when you meet.
then it just makes kinu hate you even more and go with another pissant instead.
And then they spent likely thousands of dollars to comission a TON of art of her being fucked and posted it everywhere.
In fact, tob's avatar is from this commissioned art.
Then for another example you have etheruined.
Etheryn was a femboi male who identified as female and had as goal becoming a real woman. something entirely doable with magic.
which required a quest to remove his enchanted chastity cage.
savin got so angry at being asked to finish etheryn that he decided to shit all over the fans of the char by...
having him take of the chastity cage, get a giant bitch breaker, cuck the MC, and change his mind about being a girl.
from now on he is gonna stay a boy forever. get cucked player.
how dare you ask savin to finish a project.
Savin is repeatedly bullying his employees (the other writers), and spiting both them and his fans. he is a malicious boss.