This is the typical "hatred of the web" that I usually ignore. ES2015 brought a ton of huge language improvements that are still filtering out into usage, Babel means you can use them all now without waiting for browsers to implement them, Webpack gives you a ton of flexibility for packaging it, Eslint allows you to lint in a completely pluggable way, NPM (and now Yarn, which fixes many of NPM's problems at scale) allows you to effectively manage dependencies, Typescript or Flow allow you to incrementally add the benefits of static types, and Javascript's "functions as a first class object" allow it to behave as a powerful functional programming language.

It's very possible to write--and deploy--very high quality Javascript today.