I personally don't like that Javascript has had to have a ton of work done on it to get it to the point of other languages that were better at their first release. It was just a ton of time spent on something that was weak to begin with.

If Javascript were better at the beginning, and this same effort was spent on it, it probably would be ruling the world, front and back-end, and be a really good language with great tooling around it.

There was a great amount of debate about nulls being a billion dollar mistake, but Javascript probably beats it in monetary damages by far.