Funnily enough, there's another post on HN's front page that (self) explains why JS is a flawed language:

https://blog.bitsrc.io/11-javascript-utility-libraries-you-s...

It's too big for a TLDR;

But, just #1 in that list - You need to use a utility library to work with data types in a normalized form? In 2018?? Let that sink in. I hadn't had to do this with any other language.