Your reference seems to miss the point. The question is - what was wrong with existing languages? Why was JavaScript developed instead of using an existing language?
Javascript was not created to "fix Java's 'scary syntax'"!! Java applets were self-contained features embedded in a webpage whereas javascript– argh! Why are we having this discussion!? :p
b. It's not talking about "developed to replace," it's talking about "was developed in response to a perceived problem."