If you're interested in learning ES6 basics in 20 minutes, this is a great starting point: https://github.com/lukehoban/es6features

Check out this repo, if you have a "little more" free time: https://github.com/ericdouglas/ES6-Learning

To be honest, I used to dislike JS not so long ago - it was hard to debug, I had to use strange conventions to write OO code etc. But after learning more about the ES6, react/flux, node, Flow etc. I can honestly say that I really, really like JS. I think that I had negative feelings towards JS because I was using it "the old way" and completely ignored the language improvements & community/ecosystem that grew aroud it. But I learned my lesson :).