Since the author wasn't interested in trying to fit into canon, that doesn't seem to be a fair basis for dismissing his/her writing.
However, there are plenty of others (standard IMO disclaimer applies). ;)
(As a very quick & somewhat quantitative example, look at how many words the author spent on the contrasting views & strained relationship of Ma Potter & Pa Potter WRT magic in the first chapter, vs. the approximately zero words spent on that same topic in the second chapter when magic is demonstrated directly for them.)
