That was an entertaining conversation for sure about criticize or not authors and series. I will be very straightforward: it is bullshit saying that we cannot criticize and even more bullshit that the authors should ignore their readers criticism. The entire market is based on that! It is funny that people say such things here, where we discussion Jump TOCs, the biggest example that readers' opinions matter. See your series rolling down the mountain in the TOC is not a kind of criticism? Shokugeki no Soma authors, seeing the series going down, chose to ignore it? Obviously not, they are working to recover the series position in the magazine, the new arc already sounds very good, bringing some things that people really wanted to know.
Criticism doesn't mean that one doesn't like a manga. I, for the most part, criticize only things I care about (except Fairy Tail hahaha) because I want to see it improving, they are my impressions about the chapters/series as a whole and I cannot lie to myself and pretend everything is all right just because I like the series. Of course, there are people out there who read something just to criticize and don't drop the damn thing already, these people are annoying and I condemn them.
Sigh... That's why I'm not discussing mangas here anymore... People don't know the difference about opinions and facts and even criticize you when you criticize an aspect of a series.... The forum is losing its purpose...