I originally liked Dark Wolf Shiro type villains, but now I'm honestly bored of them. Let's face it, Shiro is a really good writer, but I'm bored of everything about the villains. Waifu Catalog, Dark Wolf Shiro and other villain protagonists are literally the same and it is impossible to distinguish them.
I really like fanfictions where the MC is the villain, but I'm bored because I don't see the difference between the villains because they all act the same and do the same terrible things.
It's hard to take villains seriously when the attitude about rape is "rape her until she likes it" or mind control. I feel like the whole hentai when there is rape in the chapter. The part where the victim's partner acts like an NTR protagonist is confusing because the characters react like that only in NTR hentai.
SFW villains are just cardboard cutouts who just want more power without a logical motive or reason and in most cases they feel no joy in what they do.
NSFW villains are just horny beasts similar to Hentai Orcs 100% of the time and are the same in everything but appearance and name. I feel that their personalities are the same, is all the motivation for their actions just sex. Everyone acts as if they were just Incels in their past life.
There is no need to talk about their ego. They are the same as Xianxia protagonists and react to any opposition with violence. It is constantly emphasized to us that they don't care what others think of them, but they react to every slightly difficult obstacle or opposition by having narcissistic breakdowns. Purely psychopathic MCs are the rarest type of MC and most protagonists meet the criteria for malignant narcissism.
They claim that they don't care about the opinion of lower beings, but with they actions they constantly seeks the confirmation and worship of "lower beings".
Despite the fact that they are evil, the only crime they commit is rape, slavery and, in minor cases, pedophilia. Where is torture for fun. Where is the genocide?
The MC will not exterminate the Tyranids or the Skaven, but they will enslave them and claim that this is morally superior to extermination by snapping their fingers. One-on-one killing is common, but even though it has the power to destroy planets, it will not destroy planets even for military purposes like fully industrialized planets or planets polluted by Tyranids and The Flood.
In fiction, the motives of villains are only money, sex, power, adoration, hatred, desire for a better world and sadism. But the only motives SI has are power and sex. Most of the evil in history was done because the road to hell was paved with good intentions. Evil SIs do not have good intentions nor are they delusional and in countless cases they have thousands of words where the author justifies them and where they justify themselves instead of admitting their true nature.
Lack of self-awareness is another thing that almost everyone has. Despite having the intelligence of Doctor Doom and Reed Richard togethers they lack the ability to admit to themselves and others that they are evil.
I always hate the saying "absolute power corrupts absolutely". that's so stupid. it's not corruption, it's a revelation. power doesn't change you, it shows you who you are at your core, without social restrictions, subtle chains of community. with absolute power, comes absolute freedom, and with absolute freedom, your true self will eventually emerge. some would like to take over everything, some would destroy everything, some would just say "leave me alone", some would like to help everyone (regardless of whether they deserve it) and so on. The saying "absolute power corrupts absolutely" really says "there is no such thing as a truly good person".
Regarding the lack of good intentions, Nazis, Communists and Religious Extremists are among the most common groups of villains, but they do not exist in fanfiction. There is only one fic of that kind on QQ where the protagonist is a neo-Nazi in Worm.
I'm honestly surprised that no troll or just out of spite has tried to use characters with controversial opinions just to piss people off.
In the end, I feel like I've seen everything and I have the urge to deliberately write a Wolfstein Nazi self insert out of spite where the MC is sadistic and where he goes around the Multiverse proving what a truly self-aware and sadistic MC can do because it makes me sick when I see the insertion of political themes into everything and oppression by someone else's opinion. There is a technical term for someone who confuses the opinions of a character in a book with those of the author. That term is idiot.