To be fair, one shouldn't bash Brendan, he had to build the initial JavaScript language in a week[1]. It's not his fault the language became the defacto web-language.
[1]http://www.jwz.org/blog/2010/10/every-day-i-learn-something-...
[1]http://www.jwz.org/blog/2010/10/every-day-i-learn-something-...
I understand it was just a stupid joke but when your stupid joke insults a person who deserves praise you should probably reconsider the joke.
The point of the JS bashing in the slides is that the Bad Parts do exist, and CoffeeScript does a great job of routing around them, as does Strict Mode.