I am primarily a C++ dev and had to use JS for web development. Having no previous scripting experience, I was gobsmacked at the ease and freedom it offered, especially wrt string processing. You need to have been a monolingual C++ dev to appreciate what I said.

I don't hesitate to say I like JS. These days I try creating any small experimental programs I need in JS and run them in FF instead of starting the whole build process with C++ code. If there is file i/o needed, I use an extention that I have created for this purpose. When necessary, converting this prototype into C++ code is not a big deal.

As for its flaws, well, which language doesn't have flaws. Part of being an experienced dev is to learn, respect and avoid the shortcomings of the technology you use, aka paying attention. Its arguable that some flaws in some systems are worse than some flaws in other systems since the design factor comes into play, but with something as pervasive and monopolistic as JS, there is a clear choice to be made - create something better for the community or shut up and live with it. I am sort of doing both. (To pull off the first one, I need some serious credeitials, which I hopefully earn in the near future.)