CCS doesn't have much bashing because according to fandom only four characters exist but when it does, the bashing can get vicious.
Poor Kaho, probably the most-hated character. Why?
- She's a slut!
She dared to have two boyfriends over several years, and she knew both of them for quite some time before dating them. Doesn't seem very slutty to me. Yet she's often characterized as cheating left and right or just being sex-obsessed (even by so-called fans).
- She's a pedophile!
So she was Touya's student teacher when she first met him. He was a young teenager, she was an older teenager or early twenties at oldest. That doesn't make her a pedophile. Her second boyfriend, Eriol, is an adult with two children, no less, and after knowing him for years before making her feelings known, she probably understands that better than anyone else not part of his family. If anything, Eriol's robbing the cradle when dating Kaho.
- She's a jealous bitch!
...which is why she enjoyed her "replacement's" company when she returned to Tomoeda. Jealousy that Yukito stole her man, that's why she teased Touya about him and suggested that he confess his love. As for being a bitch, she always acts very sweet, even to people who act hostile to her.
- She broke Touya's heart and she'll do the same to Eriol!
Ah, yes, the one with some truth. She did break Touya's heart, but she had reasons for leaving him, and very unselfish reasons at that. She had to leave because of her role in the Clow Cards' fate, and before she left, she made a prediction to Touya that he would find a new love, and that when she returned, they would be friends. She didn't walk out without a word; she told him in advance, said that she did love him, and predicted that they would still get along. Why that means she will walk out on Eriol leaving only her engagement ring as an explanation and never return is beyond me.
Yes, he's bashed. Not as widely as Kaho, but even more viciously, if that's possible.
- He's a Sue!
So he's special and several characters love him. Okay, he might be a Sue. But so is Sakura, and Tomoyo, and Syaoran, and Kaho, and Nadeshiko... Simply put, every character has a butt-load of Sueish traits. But to the bashers, Yukito is the only Sue of CCS, because all the other Sueish characters get exemptions for some reason. No, I don't get it, either.
- He's boring!
That's a matter of personal taste. Personally, I find all of the main children boring, particularly Tomoyo. But why does him being boring mean that he should be bashed? Especially when "boring" doesn't take into account his relationship with Yue or any of that.
- He's worshipped by fandom!
Ahahaha. No, he isn't. To half the fandom, he's not young enough (or apparently young enough) to exist, so he's hardly worshipped by them. To the rest, he's probably just like any other character; he has a few crazy fans, a few more people who call him their favorite, a bunch of others who like him, some who are indifferent, and the haters. He's only "worshipped" in the sense that a lot of fans don't like seeing him bashed based on double-standards.
- He's useless! He should have disappeared after Yue revealed himself!
Where to begin... As Yue's unknowing false form, he's far from useless to the story. He's also important to other characters. And would Yue really be ready to be around all the time right after the Final Judgment, even if it weren't a massive power drain on Sakura? How would the other characters have felt if Yukito just vanished, to be replaced by this cold stranger? Just because you want him gone doesn't mean he should disappear.
- He has no moods except for stupidly happy!
Ah, yes, good old selective blindness. Yukito has many moods, especially negative, in the second arc; fear, jealousy, doubt, regret, etc. But maybe since he shouldn't exist then, all those emotions are really Yue, so the argument still holds. Or something.
- He ended up with the hottest guy in CCS!
Instead of your pet self-insert? Or that Touya happens to be your pet self-insert, and you can't stand the thought of him being gay? Congratulations, you just made the same bashing statement as so many teenage fanbrats, angry that some female character ended up with their fictional boyfriend.
- Akuzuki Nakuru
She's not bashed as much (probably because she doesn't exist), but most commonly it's for threatening Touya/Yukito. Even though anyone with eyes could tell that she wasn't much of a threat in the normal sense, as Touya only put up with her to be polite and pretty much hated her. Now, breaking up T/Y by keeping Touya from saving Yue with his power, that might have been possible, but it's never what bashers seem to focus on. She's also called a ditz, even though that's pretty clearly an act; she's very sharp when alone, or with just Yukito.
- Li Meiling
Syaoran's cousin and Sakura's main rival for his romantic interest, she's bashed for getting in the way of The Holy OTP. Though the bashers seem to forget that she warmed up to Sakura, dissolved her engagement to Syaoran even before he told Sakura he liked her, and helped them finally get together. Most fic-writers have seemed to realize that and started writing her as sympathetic and Sakura's friend.
- Li Syaoran
I haven't seen much bashing personally, but he's vocally hated by the shoujo-ai fandom, for breaking up any possibility of Tomoyo/Sakura becoming canon. He's (supposedly objectively) seen as completely wrong for Sakura and coming from a family that would manipulate her.
- Kinomoto Sakura
For a female main character, she's surprisingly well-loved, but there are individuals who call her stupid and boring. Most of the bashing seems to be reserved for her Tsubasa counterpart.