Keep in mind by making this list its not an endorsement that the dev "created such a hate-able character, and its a good thing to elicit these emotions"... More like "this character is utter dogshit, and the story suffers due to his/her inclusion"
Davide (The Tyrant) - Holy fuck is this model disgusting to look at, the fact that he has so much plot armor to get away with the BS he does in the game makes it so much worse... He's a thug, he's a smut-peddler (drugs), and he's a rapist... He's not a good or compelling character at all, he's just there to piss of people with any semblance of taste, the worst part is he fails as a villain.
Maude (New Coral City) - This one is easy to hate due to her personality, and her interactions with the MC, probably the closest to good written "love to hate" character. I personally hate her cause she doesnt go away, her path in the major story is one I dont care about at all (she stole the MC's GF from the first game who was an ugly butch tomboy, big whoops keep the skank)... She makes the list because she shows up every few story segments to rub the MC's face in something your even allowed to tell her you dont care about, yet she walks away thinking she "got you good", even if you tell her you dont care LOL.
Eric (Big Brother)- I wouldnt hate him as much if the damn Mikandi model didnt become the poster boy for NTR rivals alongside the Russel and Darius models... I honestly didnt hate him as much at first, as what happened in BB was more Ann's fault than Eric... That changed when you learn his motives... he doesnt just want to NTR Max, he wants to make his family into dirty street walking whores, while stealing their home, their income, and tossing them out on the street... so yeah fuck the dude.
Allessia (Sister x3) - This bitch ruined the game for me... she gate locks the most attractive females in the game (the twins), and in some routes fucks up things with the Mom, and the gross little sister... Whats dumber is the MC becomes more powerful than her by the end, and is still unable to undo the mind control shit she does on his family, they are sluts forever more... wtf ever...
Jenny (Mike's Obsession) - Holy fuck at this bitch... think Sekai (Schooldays) but kicked to 100th power... Want to know whats sad ? She isnt even the rival, or villain of the story, she is a LOVE INTEREST !! That's how you know you fucked up with a character when people hate her instead of wanting to "get" with her. She ruins the MC's original relationship with a far better LI, and then tries to take her place... utter dogshit this character was.
Aiden (A Wife and Mother) - For a game that prides itself on "realism" this dude's side story is utter shit, nothing erotic about it at all as he is a thuggish brute, with not an ounce of charisma or eroticism at all... The lengths and asspulls the writer concocted together to make him a credible threat is "unrealistic" to put it nicely... he is a dirty gang-banger... yet somehow also has a super rich uncle that is the best lawyer in the country... said lawyer also doesnt mind risking his license by defending his clearly guilty nephew that is using blackmail and violence against his superiors (teachers, principal, etc). His plot entry is just a shitshow true and true.
Notable mentions that arent really worthy of hate, but the fanbase of the games makes me hate them...
Mr Parker (JOHN) - cant even go into that thread to discuss anything unless your willing to suck this characters dick and say that he is the best thing in this game, and anyone asking for content with anyone else but him is a dipshit.
Bailey (WVM) - Same case as the above... She literally has an online cult around her.. how fucking silly is that ? And to make matters worse is that unlike Mr Parker, she is actually a decent and likeable character.