I just found a pattern here in mangago. Once a manga got really really popular, like Caste...

I never notice about that

That's so true. People just have to be so picky and point out what the author could have done better and whatnot...

some are like that but i think some have some not exactly bad grammar which leads others to misunderstand what they said. but reading comments of others a manga is fun unless it contains lots of spoilers XD. though i really don't like it when they comment bad stuff about the mangaka and the manga he/she made as if they truly know them :(

Honestly I think it's just mangas that lend themselves to be over-analyzed, like Ten Count, Caste Heaven, Saezuru Tori wa Habatakanai, etc. These manga have psychological elements that people like to discuss (and argue) about. You don't really see those kinds on comments on the Junjou Romantica page, or the Sekaiichi Hatsukoi page, and those mangas are hugely popular. And on the Viewfinder page there was once a long discussion on whether or not Asami should say "I love you" to Akihito but that was about it. So I would say it depends on the manga. ヾ(❀╹◡╹)ﾉ~

i've never liked reading psychological TT^TT i don't know what to feel when reading one. XD. but the most thing that i tried to avoid reading is something that has drama, romance, tragedy, psychological in one TT^TT it is too dark TT^TT

I am sure the author is trying to depict something when they write heavy mangas like Caste Heaven. Like a theme the author is depicting. You get me?
It's only normal people will want to talk about these themes and address them. That is what good stories are for. Nothing bad with fans talking about it.

Don't check the comments unless you're ready to accept there are different people in this world with different opinions and it's the internet a place where you can freely express your thoughts.
Unless it's very offensive, I guess nothing can be done about it.

I think OP is referring to the negative comments that more popular manga attract. And I think that's a phenomenon that can be put down to a combination of math and human nature. The more popular a manga is, the more exposure it gets, the more people read it, the higher the number of people who don't like it.

That those who don't like it will be more likely to express their dislike openly is where human nature comes in. We delight in tearing down what we consider to be too high up, too much praised. We, in short, take a perverse pleasure in sticking pins into other people's balloons.

Actually every time i read the discussion, i always thinking, are they not tired typing a very long words? Are they realize that they arguing for fiction story? And... story like ten count or caste heaven have mature content with physiological theme (that usually will lead to... according their theme!

I agree, but I think it's because the majority of its readers are still young teenagers fail to see the essence of the plot. This is probably also the same group who use social media to attack the mangakas. When manga becauses popular of course others will check out out, even those who are originally not interested will read it only to join the conversation. Trends like this happen in daily life as well.

There are a lot of people saying stuff like "I hate it because he's cheating even if they're not together" or "x is abusing x" even though both parties agree to it. I really think this is the immature group of readers who do so. As people grow older they careless about the things they don't like and more about they things they do like after all. We start to realise our valuable time.

Because as others have said already, popular mangas like Caste Heaven and Ten Count are supposed to be analyzed. They have deep meanings and the mangaka might drop hints all through the manga that will lead to the climax.
Like take 19 Days for example, it started off to be seemingly light hearted but later became angsty and full of plot. And not to mention, throughout the whole manhwa, there are hints about what's to come.
But I think you're right about the people who think themselves to be a master a psychology or a detective. A lot of the times they look too deeply into what's happening, and then they conjure up some BS that doesn't even make sense. I once read somewhere that the character having his hands in his pockets was a symbol and I thought 'dude..stop'

There will always be trolls attacking the comments section of very popular mangas. As well as extremely opinionated children who think of themselves as experienced adults. Why should that ruin your enjoyment of a manga? You can CHOOSE to NOT read the comments. Simple as that.

Not only caste heaven and Ten Count. If you visit Finder & Hidoku Shinaide, there will be people who claimed to be "it's ny right to say my opinion" but sadly, when people oppose their opinion they get mad. So pattern is like this
Dislike manga --> harsh critic to the point of rude and disrespect --> got replied and criticized because if their opinion --> war.
If people want to say "bad opinion" be prepared to get bashed by people who oppose their opinion. Their bad criticism actual hurt for some fans and sometimes disrespectful to the mangaka, so when they get bashed out, it's even. You do bad, you got served bad. But sometimes they can't get it. Keep saying it's my right to say this. Then, it is THEIR RIGHT to say that as well.
Anyway joining war isn't healthy lol. We here to read for fun. Just ignore them :) our life will be much better

What you said is true, and i almost forget that majority of reafer is teenager! Really, know i understand the meaning of 'readers's discretion is advised' hahaha

lots of people nowadays just type and click. sometimes they don't try to read their comments (especially the suuuuper harsh ones) in another perspective which leads to something not good impression. i mean, reviews totally affect others who want to read especially those first timers. like in movies, rotten tomatoes (〜￣△￣)〜. is my grammar correct? sorry i'm not good in english hihi