Equality isn't really as broken as people seem to think. And if it bothers you that much, use ===. Yes, it can be annoying, but it works.

What do you mean about maps, and whitespace sensitivity? I've never heard anything about that.

Case sensitivity i'm assuming you mean the automatic semi-colon insertion due to a line break after a return statement? I have a hard time seeing this as being a reason to dislike an entire language.

Most languages have features to avoid, JavaScript is no different. Many JavaScript developers use linters to avoid the poor `==` feature. I'm unfamiliar with the argument of the `Map` datastructure implementation being broken. Do you have a reference to that claim?