Yeah, the problem with a good anime adaptation that brings main stream audiences to the manga is that main stream audiences suck.
People will start to review bomb the manga and call it mid for any miserable fucking miniscule thing that the story does not do as perfectly as they wanted it to.
Case in point: We had 1 page of backstory for the new character and people are hating it and calling it lazy.
Because it is easy to fucking hate, I could boil down umbrella boy's backstory to "Tragic Orphan" and call it lazy, but that would be disingenuous.
Tropes are not bad, nor are they easy, it all depends on how the author works with them, and so far the work done has been great.