I personally use [redacted], while some manga are missing, the interface is really practical ( a lot better than [redacted]), there's a dark theme as well as different options of reading, you also have access to a list just like here and a follow option to know when a new chapter comes out.
It's also on this website that post-release editings are published, most other websites don't bother with re-uploading the chapters, so whenever the editing quality is overall better here as well.
The word "Objectivity" holds much more value than you may think. It isn't simply a question of being verifiable or something like that, it's a rule set in stone that cannot be changed. If there was objectivity in art, no one would bother with opinion matters and everyone would think the same at some point, just like with maths and modern science.
But that's also because every story doesn't have the same aims, there isn't a single way to write a story either.
You shouldn't set absolute rules when talking about art. Really, it's temptative, but not only will people despise that ideology, it's also fundamentally contradictory with the concept of art itself.
Art is all about freedom, and while I hate abusive relativism (Basically rejecting any and every rule), nothing is set in stone in art and you can always debate things, it's just how things works.
The only truth in analysis lies in overcoming another's argument with a better reasonning, but you can't ultimately call it objective. It's frustrating, but nothing anyone can do about it.
I overall agree with your point that the show is extremely shallow, with very poor characters, random romances that goes nowhere and high repetitivity. And personally, good action is far from being enough to make something any good. But if I could give you an advice in criticism : Never use the word "Objective" for art. I did the same mistake long enough, and so I know how important it feels to give legitimacy to one's judgement. And so I think the word you're looking for would rather be "Rationally". Because even if we can't put objectives laws on quality, it doesn't mean that you can't better your judgement of something.
Most of your points are accurate and can hardly be denied (If not for the shock value argument with which I strongly disagree since it's most definitely not the aim of the manga), but they're only accurate because you can compare with other works. Instead of seeking objectivity from arbitrary rules (which is kinda ironic ngl), an analysis is rationnal because you can target points of a manga and compare it with other works.
Simple exemple : Why would people say that characters like random Isekai MC are bland ? Because there are billions of characters with a lot more depth, character development and a much more original design.
By comparing the two, you create a legitimate argument that is rational because it's verifiable.
Your reasonning is rationnal, even if it may lack of depth in the analysis, that's what you should enlighten, but it isn't objective in any way.
In conclusion : There's no objectivity in art, but it absolutely does not mean that all arguments are equals and hold no value at all. Rationnal arguments are the fundation of a good analysis. One's just have to not try to judge something entirely based on raw feelings.
Appreciation and critic are two different things, and I agree with you that you can like bad things and dislike good things.
But their quality only depends on a rationnal definition of quality to begin with, not on an objective law.
Honestly, the writing of Mirai Nikki is so consistantly bad, and the characters so awful that I don't know if I could manage to laugh at it more than being triggered by the story.
However I definitly agree on that perspective for Big Order, this one is on such a tier of permanent nonsense than it is definitely laughable. Hell, I even watched it while knowing that it was going to be pure garbage on a stream with friends just for the fun of it, and God knows we had a good laugh at it.
Easy call, you can hardly make worse, it's pretty much my standard for the worse way to write a story ever.
Big Order
Everything this author does is pretty much cursed beyond belief anyway so here's another one I don't even need to introduce
Also if you've watched the season 1 of Psycho-Pass you can watch this as well.
Personally, I think a LOT about these kinds of questions. And at the current state of my reflexions, I see mangas and animes as art before them being entertainment. They're still both tho, but what I ultimately judge in art is not entertainment but rather what its limits are. If the manga I read is nothing but fanservice or is just a very straight-forward story with no real thoughts or complexity, no matter how much I liked it, I'll rate it lower than a manga that truly managed to create something unique and complex.
Also, I think that a lot of mangas are easier to enjoy than others, because they're more centered around action or comedy, or are just more accessible overall. But then, even if I have an easier time enjoying something because I don't have to think too much about it, should I still rate it higher than mangas that are far more complex and creative ? Definitely not in my opinion.
Same with my favorite mangas, I sometimes had a more enjoyable time reading some action-heavy ones because of the hype and the drawing, and stuff like that, than the ones that appears in my favorites, but then I don't necesseraly have a strong bond with them. I just enjoyed them because they were fun, but that won't make them my favorites.
There are several ways of enjoying something as well. Sometimes what you like the most in something isn't necesseraly the fun it provides, but what you feel towards the work. What it means to you personally.
Still, I won't advantage even my favorites works. I judge everything equally on what I feel is well-done or not. I try my best to give my ratings a meaning, not just some random numbers put on a work that means absolutely nothing, that's why a lot of works that aren't even in my favorites gets higher ratings than those.
To sum up, I see enjoyement as nothing else than a consequence. It's the most subjective thing that you can possibly draw from a work, and it means absolutely nothing about it, only about yourself. So I can't judge something on entertainment, since it has nothing to do with what the work is.
My judgement is still purely subjective, but it at least has a logic. And it is a simple one : The more a manga creates something truly unique, deep and/or complex, the higher will be the rating.
Easy target, everything this author does is cursed beyond common sense so no wonder this was the shittiest thing I've ever witnessed.
Litteraly nothing makes sense, the plot goes all over the place for no reasons and still manage to think it's actually smart and thought-provoking even though it's as empty as a bottle.
Big Order
Maybe something like Claymore ?
Link