I'm trying to decide if you are being willfully ignorant of the point being made.
It's one thing if grammatical "errors," "misspellings," and poor diction occur in character dialogue. That would be "in character" for the text and I would be entirely OK with it.
That is not what I am criticizing.
It's a whole other thing when it occurs in the narration that is obviously the voice of the actual, living and breathing author narrating the story. In this case it does not add "charm" or "character," it is simply bad writing. Because the product in question here is the story itself, and it is being sold for profit, it is a professional work. It is unprofessional to write poorly when you are a professional writer writing a piece for publication and sale.
If you enjoy bad writing, bad grammer, bad diction, and confusing dialogue, you are certainly entitled to that. I suspect you will be rather lonely, though.
I do not enjoy such things. I'm no english professor. I commit my own writing sins. And we are all human. But if you are going to publish an internationally distributed book of fiction, maybe you should expend a little extra effort and do real and professional proofing and editing.
That said, I'm sure Wyrd does. But alot slipped through the cracks in this book, enough for even me to notice, and I'm no professional.
If it were someone writing fan-fic in an internet forum, I would not care enough to comment. When it's published and sold professionally it's a different matter.
To answer your question, that is what I find wrong with enjoying the work as it exists. Now it's my turn.
What's so wrong with wanting Wyrd to improve their product and produce grammatically correct, well-written material?