The syntax of your language doesn't change its performance when running.

I can appreciate that not everyone likes JavaScript - it's all a matter of personal preference I guess - but saying that Go is a better language because of the syntax is like saying bananas taste better because of their color.

They are two very different languages with each their strengths and weaknesses. Does JavaScript have a few design flaws? Absolutely! More so than many other languages? Quite possibly! Does it make me write worse software if I'm aware of those quirks? Most certainly not.