Are you the author?
The whole article just seems to be missing the point entirely.
It pretty much answers everything with "oh but you can write a hack to work around that" or "oh there is some library you can use that plugs that gap". Whilst yes, these may be viable "solutions" for hacking something out. It doesn't refute the claim by the original article that JS is a bad language. It actually just reinforces it with yet more examples.
The only positives to take away from the article are where it highlights features coming in ES6 to actually solve some of the problems. But these admissions seem to contradict the premise of the article.