I'm honestly having trouble understanding exactly what you're trying to say, but I'll attempt to respond.
>You must not have all the people praising those bad endings as artistic even despite the writers having said otherwise.
I don't know who "all the people" you're referring to are, how many of them there actually are, or where you're even seeing them, but if that's how they feel about a particular ending and they can make a case for their viewpoint regardless of whatever flaws the ending may have had, so what? Just because you like the way something was done doesn't mean you can't also think it could have been done better. Likewise, just because something is flawed doesn't mean you cannot still enjoy it, and have perfectly valid reasons for feeling that way.
>We're lucky that no one had the idea to copy those stories.
Yeah, just imagine where we'd be if someone had tried to copy a story like MiG on this site. Can you imagine that? What this site would be like if people thought to try to copy a story like that? I sure can't. Nope. Can't possibly imagine what this site would be like right now, at this very instant, if that was a thing that had happened. Nosiree. Can't possibly fathom what that would be like. At all. We truly are lucky that nobody has ever done that exact thing on this site, ever.
Also, I am totally not being a sarcastic dick right now. Nope. Not one little bit of sarcasm or dickishness here.
>and if what I said wasn't true then they do they never read the new stuff? By your logic they'd have seen the mistakes and went to look at modern stuff to see if it's improved.
I'm going to assume you're asking "why do they never read the new stuff" to which I would have to ask, in turn, why are you asking me when I never said a single word about people reading newer stories. Maybe they are, maybe they aren't, I don't know. I do know, though, is that it likely has nothing to do with older stories being treated as if they were flawless masterpieces with no flaws to them of any kind, as you seem to believe. The fact of the matter is that you're not very likely to learn as much from the newer stories as you would the older stories. Most of them simply haven't been going long enough to make the sort of mistakes you would want to learn from. Sure, you might pick up on little, relatively minor things, but you usually can't identify the truly significant mistakes until after they've already happened. Likewise, you can't often tell if people learned to avoid such mistakes until after they clearly avoided them, and sometimes you might not even realize they had done until long after the fact.
Let's consider what you said again:
>By your logic they'd have seen the mistakes and went to look at modern stuff to see if it's improved.
What if the improvement that was needed in the older stories dealt with something that came at the very end? How, exactly, are you supposed to know the newer story isn't going to experience a similar problem with its ending, when it's nowhere near the end? You're basically talking about the difference between cutting open a 80 year old dead guy to learn that he died lung cancer, and cutting open a healthy 20 year old to try to guess that he might die from lung cancer. Maybe he will, maybe he won't, but you can't be certain either way because it hasn't happened yet.
This is why, as I have already said, I believe older stories are recommended the way they are. Part of it is because people liked them, sure, but they are also provide excellent examples of the sorts of problems and pitfalls that can crop up in a story while also displaying some of the things that can be done right. There are things you can learn from the newer stores, too, but they are not going to be the same lessons. Besides that, if it's a story that's currently running, it's best if you just read it for the sake of enjoying it, and save the in-depth analysis until after it's ended. Nobody likes it if you try to do an autopsy on someone who's still alive, and stories aren't much different.
Aside, you know, from the fact that one is apparently a "felony" or something. That's a bit of a difference.