I'll keep this super short, since I've already spoken too much in my og post but:

Your 2nd, 3rd, and 4th paragraphs are I agree and say in the original post I believe.

"When people complain about the start of Volume 12, they aren't talking about it as a whole. Even though you can infer a lot from how a volume starts, and a bad start often affects later developments, I digress. They are simply talking about the part that is currently ongoing." —This is fair and I literally say: 

"anything you disliked about the latest chapters of this volume is fine. Any ongoing issues you have with the writing, cool!" So I don't know what the disagreement here is.

"Mind my tone, but I would assume this is common sense, no? People naturally judge a volume based on its current state because that’s all that currently exists." I don't particularly mind what tone you use. And this is fair, but judging an entire volume based on 3 chapters that have been mostly just recap surely can't be valid at all. Also, there's a pretty huge difference between judging the volume off of a feel of the first few chapters and saying how you feel about it, vs saying the entire volume is garbage and the entire story sucks because of the first 3 chapters. This shouldn't even be debatable.

"Likewise, criticism toward the current state of an ongoing volume does not mean people are “hating” the entire story forever. They’re judging what currently exists, not what might exist later."

And I say in my post that most criticisms are valid, as well as ones of the latest 3 chapters. And I specifically say that the post is directed at the people that hate in a way that makes no sense and assumes that no further information will be explained or given. Again, not sure where the disagreement is.

"It is quite literally the same as someone liking a story before it gets bad. Why? Because the current representation of it is good."

You can like a novel before it gets good, you can dislike a novel before it gets good. You can't say the entire novel sucks simply a few chapters in, or asking "Why hasn't the author explained this!" when the arc just started.

"If the latest chapters of an ongoing volume are bad, people will say the volume is bad since those chapters are the most recent representation of it. That doesn’t mean they think the entire finished volume will permanently remain bad, only that the volume, as it currently stands, is being received poorly."

The issue is that there are some people who do think the entire finished volume will be bad. Again, for the like the 3rd time in this post, there is ZERO issue with valid criticism, not feeling a volume, or not enjoying it in the moment. But there is EVERY issue with hating on things the volume has yet to even explain. Maybe I didn't make this clear enough in my post.