Its not inclusivity that makes a story suck, its the bad writing
I know a few editors and they mostly maintain that the writing in the Harry Potter books deteriorated as the series progressed and the story continued to enthrall. So if a story is good enough, it can survive being poorly written.
Stephen King—not a great writer either—has said that a great story will carry poor writing much farther than vice versa. Others of many examples:
Don Quixote
American Psycho
Dan Brown