PigKing covers a variety of themes, and from what I can see, it is quite balanced. There are three renderers, and saying that the theme or genre is repetitive, whether it is Bestiality, gang bang, LGBTQI+ themes, or any other, seems unfair to me. For example, I really enjoy seeing Brandie involved with dogs, and Cinthya with horses and monkeys; I find it very amusing. To me, PigKing is essentially about Bestiality, and this theme does not involve only animals with humans; it is quite broad. Although I find your point a bit inelegant regarding the artist's work, I still understand that it is your opinion.
From what I have noticed, you promote a lot of things you do not actually like. I understand that you may not appreciate certain publications, or that, at times, the story follows lines that seem somewhat dull. There are also situations in the stories, in general, that do not appeal to me. Regarding the gang bang issue, when you imply that the character becomes a neighborhood trash bag, that is your opinion. I believe that, in various passages of Moms Help, this happens, especially during street gang bang parties, turning the character into a sperm receptacle. I am just trying to point out the obvious: I repeat your opinion, even though I do not agree with it.
Although written by a mathematician and logician, or perhaps precisely because of that, The Soviet Man by Alexander Zinoviev is one of the best sociology books ever published. Without reading it, no one can truly understand the functioning of Soviet society or of the many societies that, directly or indirectly, were inspired by it. Among many valuable lessons, the author teaches that in every professional career, whether grand or humble, there are two sets of knowledge, different and mutually inaccessible, that a person must master to achieve any success.
The first, of course, relates to the object or purpose of the task at hand. If someone works in a soap factory, they need to know something about soap; if they are a nurse, something about the human body, diseases, and medications; if a legislator, judge, or lawyer, something about laws. In the case of 3D erotic stories, I believe the author must put in considerable effort to create something worthy of being read; otherwise, PigKing would not have achieved the success he did.
That said, I think that when you criticize the author's work, it means you do not value their effort, simply imposing your own desires and opinions. However, you still explain the reason for your criticism, which is valid. Freedom of expression applies among equals: what an adult says to a child must be limited, and even more so if the child, as a student, is legally required to listen.