There's an old adage, all publicity is good publicity, and whilst I don't think that altogether holds true there's nothing particularly negative, and as Pete points out more than a couple of iffy "facts" within it.
If Monarch hadn't hit the buffers Calder wouldn't even have written the article, but as it is Monarch's failure hit BHX harder than anywhere else and gave him an excuse (reason) to srite t article.
As for the man himself and his knowledge, there's a few few on PPRuNe who are a deal more knowledgeable than Simon Calder.